Which figure in the study of India's size is not a linear measure?

Correct answer: (3.28) million sq km

The direct answer is option C: 3.28 million square kilometres. A linear measure tells us a length or distance and uses units such as kilometres. An area measure tells us the amount of surface occupied and uses square kilometres. India’s area is about 3.28 million square kilometres, so this figure is not a linear measure. Option A, 15,200 km, is written in kilometres and represents a length, so it is linear. Option B, 7,516.6 km, is also written in kilometres and represents a coastline length, so it is linear. Option C is correct because “square kilometres” means area, not one-dimensional distance. Option D, 3,214 km, is a length measurement, commonly used for India’s approximate north–south extent, so it is linear. The key reasoning is to inspect the unit, not just the number: km means distance; km² or square km means area. A number written in millions does not automatically mean area—the unit decides. The exam cue is: length has one dimension and kilometres; area has two dimensions and square kilometres. Do not confuse India’s area with its north–south or east–west extent.