Rivers and Lakes of India

Correct answer: C. Krishna

The correct answer is the Krishna River. Malaprabha rises in the Western Ghats of Karnataka and joins the Krishna river system through its drainage network. The governing geographical concept is a tributary relationship: a smaller river contributes its water to a larger main river, either directly or through another channel. Malaprabha is therefore classified within the Krishna basin, not the Kaveri, Godavari, or Mahanadi basins. The association can be reinforced by remembering other important Krishna tributaries, including Bhima, Tungabhadra, Ghataprabha, and Malaprabha. Thus option C correctly identifies the major river system.

Correct answer: A. Krishna system

The correct answer is the Krishna system. The Koyna River rises in Maharashtra and is an important tributary of the Krishna River. The governing concept is drainage-basin classification: rivers are grouped according to the larger river system into which their water ultimately flows. Koyna is also associated with the Koyna hydroelectric project and dam, but the question asks for its river system rather than the project itself. The Ganga and Brahmaputra systems drain northern and northeastern parts of India, while the Mahi has a separate west-flowing basin. Because Koyna contributes to the Krishna basin, option A is correct.

Correct answer: C. Yamuna

The correct answer is the Yamuna. The Betwa rises in Madhya Pradesh and flows through the Bundelkhand region before joining the Yamuna. The governing concept is the hierarchy of river systems: Betwa is a tributary, Yamuna is the larger receiving river, and Yamuna itself is part of the Ganga basin. The Ken is another important river of the Bundelkhand area, but the question specifically asks about Betwa. Narmada and Mahanadi have separate drainage basins and do not receive the Betwa. Therefore, tracing the river downstream leads to the Yamuna, making option C correct.

Correct answer: A. Brahmaputra system

The governing geographical concept is river-system hierarchy: a tributary is a smaller stream that joins a larger trunk river, and its basin is identified through that connection. The Manas rises in the Himalayan region of Bhutan, flows southward through or along the Bhutan–India region, and joins the Brahmaputra system in Assam. Therefore option A is correct. The Ganga and Indus systems belong to different drainage networks, while the Krishna is a Peninsular river of southern India. Remembering the Manas with the Brahmaputra also helps distinguish it from other Himalayan tributaries such as the Teesta and Subansiri.

Correct answer: B. Arunachal Pradesh

The governing concept is the geographical association between a river, its source region and the state through which it mainly flows. The Dibang rises in the highlands of Arunachal Pradesh and flows through that state before joining the Brahmaputra system in the eastern part of the region. Hence option B is correct. Mizoram is associated with rivers such as the Tlawng and Tuirial, Tripura with systems including the Gomati and Manu, and Meghalaya with rivers such as the Simsang and Myntdu. The Dibang is also commonly remembered with the Lohit and Siang as important northeastern contributors to the Brahmaputra.

Correct answer: C. Brahmaputra system

The governing concept is drainage-basin connection. The Lohit is an important river of the eastern Himalayan region, flowing through Arunachal Pradesh and joining the Brahmaputra system in Assam. Once it joins that larger river network, its waters ultimately move through the Brahmaputra basin toward the plains and the Bay of Bengal. Therefore option C is correct. The Narmada, Godavari and Kaveri are major Peninsular river systems with different courses and drainage basins. A useful memory link is that Lohit, Dibang and Siang are major northeastern rivers associated with the Brahmaputra system, not with the large west- or south-flowing Peninsular rivers.

Correct answer: A. It crosses the Tropic of Cancer twice

The governing concept is the distinctive course and drainage direction of Indian rivers. The Mahi is a west-flowing peninsular river that rises in Madhya Pradesh, passes through Rajasthan and Gujarat, and eventually enters the Arabian Sea through the Gulf of Khambhat. During its course, it crosses the Tropic of Cancer twice, which is an unusual geographical feature and the fact tested here. Therefore, option A is correct. Option B is incorrect because the Mahi is not the longest tributary of the Ganga. Option C is wrong because the river is not confined to the Himalayas; it belongs to the peninsular drainage system. Option D is also incorrect because the Mahi flows westward to the Arabian Sea rather than eastward to the Bay of Bengal.

Correct answer: A. Amarkantak region

Option A is correct: the Son River is generally described as rising near the Amarkantak region in Madhya Pradesh. It then flows broadly east or north-east through central and eastern India before joining the Ganga near Patna. The Amarkantak area is also associated with the source of the Narmada, which can make this question confusing, but that association does not make the Son answer wrong. Talakaveri is the source of the Kaveri, Mahabaleshwar is associated with the Krishna, and Trimbakeshwar is associated with the Godavari. These alternatives belong to different peninsular river systems.

Correct answer: C. Baralacha La

Option C is correct because Suraj Tal is located near the Baralacha La pass in Himachal Pradesh. It lies in the high-altitude Lahaul-Spiti region and is associated with the upper Bhaga drainage area. The name Baralacha La is therefore the key geographical link in this question. Rohtang Pass is also in Himachal Pradesh but is located farther west and is a separate pass, so it is a plausible distractor. Nathu La is in Sikkim, while Zoji La connects the Kashmir Valley with the Ladakh region. Since the lake is specifically linked with the Baralacha La landscape, option C is the unambiguous answer.

Correct answer: A. Chenab

The correct answer is Chenab. In the upper Himalayan region of Himachal Pradesh, the Chandra and Bhaga are two important headstreams. They meet at Tandi, near Keylong in the Lahaul-Spiti region, and the combined stream is traditionally called Chandrabhaga. After entering the Jammu region, this river is widely known as the Chenab. Ravi, Jhelum and Beas are also important rivers of the Indus drainage system, but none of them is formed by the confluence of Chandra and Bhaga. Thus, the geographical sequence is Chandra plus Bhaga equals Chandrabhaga, later called Chenab.

Correct answer: B. Chandrabhaga

The governing concept is river confluence and the change of a river’s name after two streams unite. Chandra and Bhaga are separate Himalayan streams of the Lahaul region in Himachal Pradesh. They meet at Tandi near Keylong. The combined stream is called the Chandrabhaga, a name formed from Chandra and Bhaga. Farther downstream, after the river enters the Jammu region, it is commonly known as the Chenab. Thus option B is correct for the name immediately after the confluence. Sutlej, Beas, and Ravi are separate rivers of the Indus drainage system and are not the name formed by joining Chandra and Bhaga. The wording asks specifically for the post-confluence name, not the later name Chenab.

Correct answer: A. Beas Kund

The governing concept is the identification of a river’s source. The Beas is a Himalayan river whose traditional source is associated with Beas Kund, a high-altitude glacial source near Rohtang Pass in Himachal Pradesh. From there it flows through Himachal Pradesh and later joins the Sutlej, making it part of the Indus drainage system. Option A is therefore correct. Rakshastal and Mansarovar belong to the source region of other major Himalayan rivers, especially the Sutlej and the Indus system, and are not the recognised source of the Beas. Talakaveri is in Karnataka and is associated with the origin of the Kaveri in the Western Ghats. The locations and river associations clearly eliminate the other three choices.

Correct answer: B. Chamba region

The correct answer is the Chamba region. The Ravi is a major western Himalayan river associated with Himachal Pradesh, particularly the Chamba area, where its upper course and source region are located. It subsequently flows towards Jammu and Kashmir and enters Pakistan before joining the Chenab system. Rohtang is more closely associated with the source region of the Beas, while the Sikkim Himalaya is linked with rivers such as the Teesta. Garo Hills are low hills in Meghalaya and are not the source region of a major Indus-system river. Thus, Chamba is the best geographical association for the Ravi.

Correct answer: A. Jammu region

The correct answer is the Jammu region. Chenab is formed by the meeting of the Chandra and Bhaga streams and is one of the major rivers of the Indus system. Within India, its important course lies through the Jammu region, where it cuts through mountainous terrain before continuing into Pakistan. Kachchh is a dry region of Gujarat, Malwa is a plateau region of central India, and the Coromandel Coast lies along southeastern India; none of these belongs to the principal Indian course of the Chenab. The river-region association therefore makes Jammu the only suitable answer.

Correct answer: A. Uttarakhand

The correct answer is Uttarakhand. The Bhagirathi, one of the principal headstreams of the Ganga, descends from the Himalayas and reaches the plains near Haridwar. Haridwar is therefore commonly described as the point where the Ganga leaves its mountainous course and enters the northern plains. It later flows through Uttar Pradesh, Bihar and West Bengal, but those states are encountered farther downstream. The question asks for the first state in which this transition occurs, not the state containing the longest course or the delta. Hence Uttarakhand, especially the Haridwar area, is the correct choice.

Correct answer: B. Yamunotri Glacier

The governing concept is the geographical source of a major Himalayan river. The Yamuna is traditionally considered to originate from the Yamunotri Glacier near Yamunotri in Uttarakhand. Glacier melt and snow-fed streams collect in this high Himalayan region and begin the river’s course. The Yamuna then flows through the northern plains and joins the Ganga at Prayagraj. Therefore, option B is correct. Gangotri Glacier is associated with the Bhagirathi, one of the principal source streams of the Ganga, not with the Yamuna. Siachen Glacier lies in the Karakoram and is unrelated to the accepted source of the Yamuna. Milam Glacier is associated with the Goriganga system in Uttarakhand. These geographical associations distinguish the correct answer from the distractors.

Correct answer: A. Gangotri Glacier

The governing concept is the source of the principal headstream of the Ganga. The Bhagirathi is traditionally treated as the main headstream, and it emerges from the Gaumukh area associated with the Gangotri Glacier in Uttarakhand. At Devprayag, the Bhagirathi meets the Alaknanda; after this confluence, the combined river is called the Ganga. Hence option A is correct. Pindari Glacier is linked with a different Himalayan drainage system. Zemu Glacier is located in Sikkim and is not the accepted source of the Ganga’s main headstream. Bara Shigri Glacier lies in Himachal Pradesh and also has no direct source association with the Ganga. The question asks about the main headstream, so the Gangotri–Bhagirathi association is the decisive clue.

Correct answer: B. Vishnuprayag

The governing concept is the identification of river confluences in the Alaknanda system. A prayag is a recognised confluence, and Uttarakhand’s Panch Prayag are named according to the rivers that meet there. Alaknanda and Dhauliganga meet at Vishnuprayag in the Chamoli region, so option B is correct. The other choices refer to different confluences: at Devprayag, Alaknanda meets Bhagirathi; at Rudraprayag, it meets Mandakini; and at Karnaprayag, it meets Pindar. Nandakini joins Alaknanda at Nandprayag, which is not listed. The pair named in the question therefore uniquely identifies Vishnuprayag. Confusing the names of the five prayags is the main likely error, so matching each place with its river pair is the correct method.

Correct answer: A. Rudraprayag

The governing concept is the matching of rivers with the correct confluence, or prayag, in Uttarakhand. Alaknanda and Mandakini meet at Rudraprayag, one of the five important confluences known as Panch Prayag. Mandakini descends from the Kedarnath region, while Alaknanda is a major stream of the Ganga drainage system. Thus option A is correct. The distractors represent different locations: at Devprayag, Alaknanda meets Bhagirathi; at Nandprayag, it meets Nandakini; and Prayagraj is the major confluence in Uttar Pradesh associated with the Ganga and Yamuna, not the Alaknanda–Mandakini meeting. Remembering the river pair for each prayag prevents confusion and confirms Rudraprayag as the only suitable answer.

Correct answer: B. Karnaprayag

The correct answer is Karnaprayag. In the Alaknanda river system, the Pindar River joins the Alaknanda at Karnaprayag in Uttarakhand. This is one of the traditionally recognised Panch Prayag, or five major confluences, of the Alaknanda. The names of the Prayags are often remembered through the joining rivers: Vishnuprayag is associated with the Dhauliganga, Nandprayag with the Nandakini, Karnaprayag with the Pindar, Rudraprayag with the Mandakini, and Devprayag with the Bhagirathi. Therefore, Nandprayag and Devprayag are plausible distractors, but the Pindar connection identifies option B.

Correct answer: C. Nandprayag

Alaknanda and Nandakini meet at Nandprayag, so option C is correct. Nandprayag is one of the five important confluences known as the Panch Prayag in the Himalayan state of Uttarakhand. A useful river-based sequence is: Dhauliganga joins Alaknanda at Vishnuprayag, Nandakini at Nandprayag, Pindar at Karnaprayag, Mandakini at Rudraprayag, and Bhagirathi at Devprayag. The question asks specifically for the meeting point of Nandakini and Alaknanda, not for any other famous confluence. Thus Devprayag, Rudraprayag and Karnaprayag are genuine Prayag names but are linked with different tributaries.

Correct answer: B. Devprayag

Bhagirathi and Alaknanda meet at Devprayag, making option B correct. This confluence is especially important because the river formed after their meeting is conventionally called the Ganga. Both rivers rise in the Himalayan region, but the Bhagirathi is traditionally regarded as the main headstream, beginning near Gaumukh, while the Alaknanda receives several major tributaries on its way downstream. The other choices are also Panch Prayag locations, but they involve different tributaries: Pindar meets Alaknanda at Karnaprayag, Dhauliganga at Vishnuprayag, and Nandakini at Nandprayag. The defining clue is therefore the Bhagirathi–Alaknanda meeting, which identifies Devprayag.

Correct answer: A. Ganga

Option A, Ganga, is correct. Gaumukh is the snout, or lower end, of the Gangotri Glacier in Uttarakhand. The stream emerging from this glacial source is the Bhagirathi, one of the principal headstreams of the Ganga. Farther downstream, the Bhagirathi joins the Alaknanda at Devprayag, after which the combined river is conventionally called the Ganga. The Brahmaputra has a different Tibetan source region and drainage course, while Narmada and Krishna are mainly peninsular rivers with non-glacial source settings. Thus the precise local stream is Bhagirathi, but among the options its major river system is the Ganga, making A the best answer.

Correct answer: A. Tapi

Girna is a tributary of the Tapi, also called the Tapti, so option A is correct. The Girna rises in the western part of Maharashtra and flows through the Khandesh region before joining the Tapi river system. This is a useful example of how tributaries help identify a river basin: Girna belongs to the Tapi basin, not to the Godavari or Krishna basins, even though all are associated with peninsular India. The Mahi is another west-flowing river but has its own independent basin and does not receive the Girna. Therefore, the geographical relationship asked in the question is Girna–Tapi, making A the unambiguous answer.

Correct answer: B. Godavari system

The correct answer is the Godavari system, option B. Pranhita is a major tributary of the Godavari in the Deccan Plateau region. It is formed mainly by the combined waters of the Wardha and Wainganga river systems and joins the Godavari near the boundary region of Maharashtra and Telangana. Because of its substantial water contribution, Pranhita is regarded as one of the most important tributaries of the Godavari. Narmada and Kaveri are separate peninsular river systems, while the Indus belongs to a different northern drainage system. The question asks for the larger river system rather than a state, so Godavari is the precise choice.