Why is there a difference in distance even though India's latitudinal and longitudinal extents are almost similar in degrees?

Correct answer: Actual distance between longitudes changes with latitude

The correct answer is that the ground distance represented by one degree of longitude changes with latitude. Lines of latitude are parallel, so one degree of latitude is approximately 111 kilometres almost everywhere. Meridians of longitude, however, converge toward the poles; their separation is greatest at the equator and becomes smaller as latitude increases. In simplified form, the east-west distance for one degree of longitude is about 111 cos latitude kilometres. Therefore, similar angular extents in latitude and longitude need not produce equal kilometre distances. The other options are incorrect descriptions of latitude and longitude. Option A is correct.