Size

Area represents the surface covered by a region, so it is expressed in square kilometres. India’s north–south or east–west extent is a distance, so it is measured in kilometres. The length of a coastline is also measured in kilometres, not square kilometres. Exam tip: use kilometres for distance and square kilometres for area.

There is a difference between 3214 km and 2933 km but both are around three thousand kilometres. Exam tip: understand approximate versus exact.

15200 km, 7516.6 km, 6100 km and 3214 km is the correct descending order. Exam tip: study kilometre figures in order.

Mainland coastline is 6100 km and east-west extent is 2933 km. Exam tip: compare lengths of different categories carefully.

Total coastline is 7516.6 km while north-south extent is 3214 km. Exam tip: treat coastline and directional distance separately.

Subtracting 6100 km from 15200 km gives 9100 km. Exam tip: choose the correct two figures before subtracting.

Subtracting 7516.6 km from 15200 km gives 7683.4 km. Exam tip: do not mix total coastline with mainland coastline.

Subtracting 6100 km from 7516.6 km gives 1416.6 km. Exam tip: remember this difference is due to islands.

In a large land area resources and markets spread across regions. Exam tip: connect size with resources and connectivity.

The direct answer is A: the coastline shows India’s sea-linked extent and contact. Studying size is not limited to the interior land area. A coastline tells us how far a country reaches along the sea and helps explain maritime contact, ports, trade, fishing, transport, and relations with neighbouring regions across the sea. Step by step: India has a peninsular position; its land projects into the Indian Ocean; a long coastline creates many points of contact with the sea; therefore coastline is an important part of geographical size and location. Option A is correct because it describes this maritime extent and contact. B is absurd because a coastline cannot make area zero. C is wrong because coastline length does not by itself state India’s world area rank. D is wrong because a coastline does not replace the separate measurement of land boundaries. Memory cue: size includes land spread and sea reach.

A country’s size is understood not only through its area but also through the boundaries that describe its position and contacts. India’s land boundary is the part where it meets neighbouring countries on land. Studying it helps students understand India’s physical extent, its continental location, and its land-based links with neighbouring states. It is different from the coastline, which is the edge where land meets the sea. Therefore, option A is correct.

The key is to identify what a land boundary measures. It does not give the length of the sea coast, a percentage of world area, or a unit used for measuring area. Instead, it shows the limits of India along land and helps explain contact with neighbouring countries. The question asks why this boundary belongs in a study of size, and option A gives both relevant ideas: boundary extent and neighbour contact. Hence A follows logically.

Directional extents show long distances within the country. Exam tip: connect extent with transport need.

2.4 percent is not coastline but India's share in world area. Exam tip: do not treat percentage as length.

India’s seventh position in the world is a ranking based on total geographical area. India is one of the largest countries by area, although it is not the largest. This fact concerns the amount of land and inland territory within the country’s boundaries. It does not refer to the length of the coastline, the length of land borders, or the distance from east to west. Consequently, option A, area, is the correct choice.

To solve the question, notice the phrase “in India’s size” and ask which measurable feature is normally used to compare the size of countries. The standard comparison is total area, generally expressed in square kilometres. A rank such as seventh describes India’s position among countries by that measure. Coastline and boundaries are lengths, while east-west extent is only one dimension. Therefore, only option A matches the stated world rank.

Grouping prevents mixing figures like 3.28, 3214, 2933, 15200 and 7516.6. Exam tip: remember by category.

A coastline is the boundary where a country’s land meets the sea or ocean. A land boundary is the boundary where its territory meets the territory of neighbouring countries on land. These two boundaries describe different kinds of geographic contact and should not be confused. Option A states both meanings accurately. The other choices describe mountain height, sea depth, or rankings, none of which defines either type of boundary.

The reasoning is a direct comparison of the surfaces involved. If the contact is between land and seawater, it is called a coastline. If the contact is between India and another country across land, it is called a land boundary. The question asks for the correct difference, so both parts of the statement must be right. Option A satisfies that condition, while every other option gives an unrelated or incorrect meaning.

Directional extent shows north-south or east-west distance. Exam tip: identify extent from direction words.

Total coastline is more than mainland coastline because island coastline is added. Exam tip: compare both coastline figures.

India’s total area is about 3.28 million sq km, and its land boundary is about 15,200 km; therefore, option A is correct. About 7,516.6 km refers to India’s coastline, not its land boundary. The figure 2.4% indicates India’s approximate share of the world’s geographical area, not an area unit. Exam tip: identify area by sq km and the length of a boundary or coastline by km.

Area shows land spread and total coastline shows maritime contact. Exam tip: understand both indicators together.

Several types of figures must be studied together to understand India's size. Exam tip: study category-wise instead of using one fact.

Area shows India's land spread and coastline shows maritime contact. Exam tip: study size through both land and sea contexts.

Correct answer: A. The unit tells us what kind of measurement a figure represents. A square kilometre (km²) is a unit of area, so it is used to describe the size of a country’s land surface. A kilometre (km) is a unit of length, so it can describe India’s north–south extent, east–west extent, land boundary, or coastline. A percentage (%) expresses a part in relation to a whole, such as India’s share of the world’s geographical area. Option A correctly matches all three units. Option B is wrong because area is not measured in kilometres; it is measured in square kilometres, and a percentage does not measure coastline length. Option C is wrong because a boundary is a length, not an area, and a rank is an order of position rather than a physical measurement. Option D is wrong because directional extent is measured in kilometres, while a world rank is written as an ordinal number such as seventh, not as a percentage. Memory cue: km² = surface, km = distance, % = share.

Correct answer: A. This option requires two kinds of thinking. First, a learner must use mathematics by subtracting the mainland coastline from the total coastline. Second, the learner must use geography to understand why the two values differ: the total coastline includes the coastline of the mainland as well as the coastlines of India’s islands. Thus, the difference gives an idea of the contribution of the islands to the total coastline. Option B gives a geographical ranking, but it does not require a calculation. Option C gives a percentage share and requires understanding what the percentage means, but no mathematical operation is asked for and the island idea is absent. Option D gives India’s area in square kilometres; it tests knowledge of a fact and the correct unit, but it does not require subtraction or an explanation of a geographical cause. Therefore A is the best answer because it connects a numerical operation with a physical-geography concept. Memory cue: calculate the difference, then ask what geographical feature explains it.

Correct answer: A. A land boundary is the length of India’s borders with neighbouring countries on land. A coastline is the length where India’s land meets the sea, including the mainland and islands. In the figures used in this question, India’s land boundary is about 15,200 km and its total coastline is about 7,516.6 km. Since 15,200 is greater than 7,516.6, the land boundary is longer. Option B reverses the two figures, so it is incorrect. Option C gives the same unsupported value for two different geographical measurements and is incorrect. Option D is incorrect because percent expresses a share, while both boundary and coastline are lengths and must be measured in kilometres. Do not compare unlike units; here both values use kilometres, so direct numerical comparison is possible. Memory cue: boundary goes around land borders; coastline follows the sea, and the two measurements are not interchangeable.