Mountains and Plateaus of India

The governing concept is the classification of India’s relief features. The Nilgiri, Palani, and Cardamom Hills are southern hill groups associated with the Western Ghats and the adjoining highlands of peninsular India. Their location, structure, and relation to the western and southern mountain systems make option A correct. The Ganga Delta is a low, depositional plain and cannot identify these hills. The Thar Desert is an arid sandy region of north-western India, while Lakshadweep consists mainly of coral islands and is not a hill system on the Indian mainland. Thus, the Ghats connection is the decisive geographical clue.

The governing concept is the comparison of the two coastal mountain systems of peninsular India. The Eastern Ghats are discontinuous because major rivers such as the Mahanadi, Godavari, Krishna, and Kaveri cut through them on their way to the Bay of Bengal. The Western Ghats form a more continuous escarpment running broadly parallel to the west coast, although passes and gaps occur. Hence option A gives both relevant reasons. Coral formation, glacial deposition, and desert sand do not explain the regional pattern of these ancient hill systems.

The governing concept is the relief structure of Central India. The Vindhya and Satpura are important hill and mountain ranges of the central Indian highlands, and the Narmada Valley lies between them in a notable rift-related trough. Thus option A correctly identifies their physical role. They are not marine islands because they are inland continental ranges. Coral reefs develop in suitable warm shallow marine waters, not across these central Indian uplands. Coastal deltas form where rivers deposit sediment near a sea coast, whereas the Vindhya and Satpura belong to the interior plateau and mountain landscape.

The governing concept is the influence of relief on monsoon rainfall and ecosystems. The Western Ghats rise close to the Arabian Sea and form a high, broadly continuous barrier. Moist south-west monsoon winds are forced to ascend the western slope, cool, and release orographic rainfall. The resulting wet forests, varied elevations, and sheltered habitats help support exceptional biodiversity, so option A is correct. A flat plain would not produce the same barrier effect. Being far from the sea would reduce the direct influence of moist maritime winds, while sand dunes indicate an arid environment and cannot explain the humid forests of the Western Ghats.

Option A is the balanced and geographically accurate statement. The Himalayas are young fold mountains formed through the continuing convergence and collision of the Indian and Eurasian plates. Their relief is comparatively young, high, and tectonically active. In contrast, the Deccan Plateau is an ancient, stable block of the Peninsular Plateau, built largely from old crystalline rocks and extensive basaltic lava flows in parts of the Deccan Trap region. Options B and C wrongly treat the Himalayas and Deccan as parts of one landform system, while option D reverses the obvious height relationship. Therefore A correctly compares two different major physiographic divisions.

Option A provides a correct regional group of major mountain and plateau features. The Himalayas occupy the northern margin of India, the Western Ghats run along much of the western edge of the Peninsular Plateau in southern and west-central India, and the Meghalaya Plateau lies in the northeast. The question asks for landforms from three regions, not rivers, lakes, islands, deserts, or coastal features. Option B lists two rivers and a lagoon, option C combines a desert, a deltaic wetland, and a lake, and option D mainly lists islands or a coastal region rather than the required mountain-plateau group. Hence A is the only suitable answer.

Option A correctly applies plate tectonic theory. The Indian Plate moved northward and converged with the Eurasian Plate; compression between the two plates folded, uplifted, and continues to deform sedimentary layers, producing the young fold mountains of the Himalayas. This explains their great height, steep relief, earthquakes, and continuing geological activity. The other options confuse the Himalayan origin with unrelated materials or processes. Coral does not account for the entire mountain system, desert sand is not the governing geological explanation, and Deccan lava is associated mainly with volcanic formations of the Peninsular Plateau rather than the Himalayan collision belt. Therefore A is correct.

Option B is correct because large parts of the Deccan Plateau, especially the Deccan Trap region, are formed from layers of basalt produced by extensive ancient volcanic lava flows. Basalt is a dark, fine-grained volcanic rock rich in iron and magnesium. Over long periods, weathering of these basaltic rocks contributed to the development of black cotton soil, which is important for agriculture in parts of the plateau. Glacial rocks are not the defining material of the Deccan, coral rocks belong to marine environments, and marine sandstone does not explain the characteristic lava-sheet structure of the Deccan Trap. Thus the geological clue points to B.

Option A is correct because the Narmada Valley lies between the Vindhya Range to the north and the Satpura Range to the south in central India. The Narmada flows generally westward through a structural trough or rift valley before entering the Arabian Sea. This position is an important feature of the physiography of the Peninsular Plateau. Option B places the valley in the wrong broad region, while option C incorrectly associates it with the Eastern Ghats and option D places it in northeastern India. The question asks for the valley’s relationship to two ranges, and the established geographical description is ‘between Vindhya and Satpura.’

Option B is correct because the Western Ghats form a high, fairly continuous barrier close to India’s western coast. Moisture-laden southwest monsoon winds from the Arabian Sea are forced to rise when they encounter this elevated relief. As the air rises, it cools, condensation occurs, and heavy orographic rainfall develops on the windward western slopes. After crossing the range, the air is comparatively drier, producing a rain-shadow effect over parts of the Deccan interior. The Western Ghats are not a branch of the Himalayas, they are not located wholly in a desert, and they are certainly not under the sea. Thus B explains the rainfall barrier effect.

The correct answer is D because the Meghalaya Plateau is geographically separated from the main body of the Peninsular Plateau, although it is geologically related to it. It lies in north-eastern India and includes the Garo, Khasi, and Jaintia Hills. This separation explains the description “isolated plateau part.” It is not the Aravalli Range, the Himalayan main range, or a coastal plain. The term refers to location and physical structure, not to sand, snow, or marine formation. Remembering its connection with the Peninsular Plateau and its north-eastern position makes option D unambiguous.

Option A is correct because the Chota Nagpur Plateau contains major deposits of coal, iron ore, mica, bauxite, and several other minerals. Coal supplies energy and iron ore provides the basic raw material for iron and steel production, so industries such as metal processing, engineering, and power generation developed strongly in and around this region. Its industrial importance is therefore linked to the combination of mineral resources and energy resources, along with transport and water availability in some areas. Seaports, coral islands, and glacial tourism do not explain the plateau's industrial base.

Option B is correct. The Nilgiri Hills lie in southern India near the junction where the Western Ghats and Eastern Ghats are conventionally understood to meet. Their location helps explain their importance as a highland region between the states of Tamil Nadu, Kerala, and Karnataka. The Nilgiris include well-known peaks such as Doddabetta, and Ooty is a famous hill station there. They are not connected with the Aravalli system, the level Ganga Plain, or the distant Trans-Himalayan ranges. Thus the geographical relationship with both major peninsular ghats makes B the best answer.

Option C is correct because the Aravalli Range is one of the oldest fold mountain systems of the Indian subcontinent. Over a very long period, weathering, erosion, and denudation wore down its rocks and reduced the height and sharpness of its relief. Consequently, many parts appear as rounded, discontinuous, and comparatively low hills rather than young, jagged mountains. It is not permanently snow-covered, it is not submerged beneath the sea, and it is not a newly formed lava range of the Deccan. The physical appearance of an old range is therefore explained by prolonged erosion.

Option D is correct because the Deccan Plateau has a broad general slope toward the east and south-east. As a result, major peninsular rivers such as the Godavari, Krishna, and Cauvery generally move eastward and ultimately drain into the Bay of Bengal, often forming deltas near their mouths. The word “many” is important: it does not claim that every river follows exactly the same course. Some rivers, including the Narmada and Tapi, flow west through rift valleys into the Arabian Sea. Therefore D states the general pattern without making an absolute claim.

Option A is correct because the Karakoram, Zanskar, and Ladakh ranges are major ranges of the Trans-Himalayan region, lying north of the main Himalayan ranges. This region includes very high mountains, broad elevated valleys, and a cold, dry environment because the Himalayas block much of the monsoon moisture. Ladakh is therefore often described as a high-altitude cold desert. The Eastern Ghats and Malwa Plateau belong to peninsular India, while the Ganga Plain is a low alluvial plain. Their contrasting relief and location clearly distinguish the Trans-Himalayan answer from the other choices.

Option B is correct. The Palghat Gap is a broad, relatively low pass that cuts across the Western Ghats between Kerala and Tamil Nadu. Because it offers an easier natural passage through an otherwise continuous mountain barrier, it has supported movement, road and rail communication, trade, and cultural contact between the two states. It also influences the movement of winds and some climatic conditions in the surrounding region. It is not a Himalayan peak, an Aravalli mineral belt, or the mouth of the Ganga. Its chief geographical utility is connectivity across the Western Ghats.

Option C is correct because the Khasi Hills of Meghalaya receive exceptionally heavy rainfall during the south-west monsoon. Moisture-laden winds from the Bay of Bengal are directed toward the steep hills, where they rise, cool, and release rain through orographic uplift. Cherrapunji and Mawsynram, located in this broader region, are famous for extremely high rainfall totals. Black soil and cotton are associated with other agricultural settings, glaciers and permanent snow are not the defining feature of these low-latitude hills, and marine coral belongs to coastal or island environments. Thus intense monsoon rainfall is the clear answer.

Option D is correct because the Purvanchal Hills form the eastern continuation of the Himalayan mountain system in north-eastern India. After the Himalayas bend sharply southward near the eastern end, the ranges continue through the Patkai, Naga, Manipur, Mizo, and related hill systems. These hills have a generally folded structure and form an important physical boundary and drainage region in the northeast. They are not part of the southern Western Ghats, the Aravalli system, or the volcanic Deccan lava plateau. Their regional identity is therefore best expressed as the eastern extension of the Himalayas.

Option A is correct because Ladakh lies at a very high elevation and receives little precipitation. The surrounding Himalayan ranges create a rain-shadow effect by blocking much of the moisture-bearing monsoon winds. High altitude keeps temperatures low, while scant rainfall produces dry soil, sparse vegetation, and desert-like conditions. The combination of cold temperatures and aridity explains the term “cold desert.” Ladakh is an inland Trans-Himalayan plateau, not a marine coast or a part of the Ganga Delta, and its natural environment is not a dense tropical forest. Therefore both high elevation and low rainfall are essential to the answer.

The governing concept is the relationship between relief features and river drainage. The Amarkantak Plateau is a highland and important watershed in central India. The Narmada rises near Amarkantak and flows generally westward, while the Son also has its source in the Amarkantak region and flows eastward before joining the Ganga system. Thus, the plateau acts as a source area and separates drainage directions. Option B is correct because it identifies this connection. Option A is wrong because a sea mouth is the downstream end of a river, not a plateau. Options C and D describe a coral island and desert landform, neither of which fits Amarkantak.

The governing concept is the regional classification of Indian mountain systems. The Satpura system is a group of ranges and highlands extending across central India, broadly between the Narmada and Tapi valleys. The Mahadeo Hills form an important section of the Satpuras, and the Maikal Hills are generally treated as an eastern extension or associated unit of this system. Therefore, option C is correct. Option A refers to a low-lying coastal landform, option B to an island formed from coral material, and option D to a depositional feature at a river mouth. None of these describes Maikal or Mahadeo Hills, which are elevated parts of central India.

The governing concept is the regional division of the Peninsular Plateau. Malwa Plateau lies mainly in western-central India, especially around Madhya Pradesh and adjoining areas, while Bundelkhand Plateau covers parts of northern Madhya Pradesh and southern Uttar Pradesh. Both are elevated, dissected plateau regions of central India and are commonly studied among the northern or central subdivisions of the Peninsular Plateau. Hence option D is correct. Lakshadweep is an island coral region, not a continental plateau. The eastern coastal plain is a low, narrow depositional strip beside the Bay of Bengal, while Kashmir Valley is an intermontane valley in the Himalaya. These landforms differ in location and physical origin.

The governing concept is the identification of mountain ranges through their peaks and hill stations. Mount Abu is a well-known hill station situated in the Aravalli Range of Rajasthan, and Guru Shikhar is the highest peak of the Aravalli system, located near Mount Abu. Therefore, option A correctly expresses their relationship. The Eastern Ghats are discontinuous hills along the eastern side of Peninsular India, not the setting of Mount Abu. The Deccan Trap is a broad basaltic lava plateau rather than a mountain range containing these features. The Meghalaya Plateau is in northeastern India and includes different hill groups, so options B, C and D do not fit.

The governing concept is the regional association of a peak and a hill station with a mountain system. Pachmarhi is a well-known hill station in Madhya Pradesh, situated in the Satpura Range, and is popularly called the Queen of Satpura. Dhupgarh, near Pachmarhi, is the highest point of the Satpura Range. This shared location makes option B correct. The Eastern Ghats option is incorrect because Pachmarhi is in central India, away from the eastern coast. Karakoram glaciers belong to the high Himalayan region, while the Khasi Hills are in Meghalaya and are known for heavy rainfall, not for these two Satpura features.