India's latitudinal and longitudinal extent measured in degrees are almost the same, but its north-south extent measured in km is greater than its east-west extent. This is due to the fact that

• A. Longitudes are not parallel lines
• B. The distance between latitudes remains the same but the distance between longitudes is greatest at the Equator and nil at the poles where all longitudes join
• C. All longitudes with their opposites form great circles
• D. The earth is not a perfect sphere