Which statement is correct based on the units of India's coastline and land boundary?

Both are measures of length, so they are expressed in kilometres

The governing concept is dimensional analysis in geography: the unit must match the type of quantity being measured. A coastline is the linear distance along the contact between land and sea, while a land boundary is the linear distance along the border separating India from neighbouring countries. Both are therefore lengths and are normally reported in kilometres. Option A is correct. Square kilometres measure area, such as the total area of India, so option B uses the wrong dimension. Percentages express proportions or shares, not the direct length of a boundary, making option C incorrect. Degrees measure angular position or angular extent, such as latitude and longitude, rather than the physical distance along a coast or border; hence option D is also wrong. Identifying the quantity before its unit is the safest way to solve this question.

This is a Class 11 Geography question. Chapter: India - Location. Topic: Size and extent.