What is the advanced reason for the actual distance difference between India's north-south and east-west extents?

Correct answer: अक्षांशीय दूरी लगभग स्थिर रहती है, जबकि देशांतरीय दूरी अक्षांश के साथ बदलती है (Latitudinal distance remains almost constant, while longitudinal distance changes with latitude)

The governing idea is the difference between angular extent and ground distance on a spherical Earth. One degree of latitude represents nearly the same north-south distance everywhere, roughly 111 kilometres. By contrast, meridians converge toward the poles, so the ground distance represented by one degree of longitude becomes smaller as latitude increases; it is approximately 111 cos latitude kilometres. Consequently, two angular spans that appear comparable need not produce equal east-west and north-south distances. Option A correctly states this relationship. Options B, C and D are false because longitude is not always greater, coordinates are angular measures rather than areas, and degrees are not identical to kilometres.