What does India's latitudinal extent of about twenty nine degrees mean?

Correct answer: India extends considerably north-south

The governing concept is the meaning of latitude. Latitudes are angular distances north or south of the Equator, so the difference between India’s northern and southern parallels describes its north–south extent. An extent of roughly 29 degrees therefore shows that India stretches considerably from north to south. Option B is correct. East–west spread is measured by longitude, not latitude, so option A uses the wrong coordinate. India crosses several latitudes rather than lying on one, and most of the country lies in the Northern Hemisphere, making C and D incorrect. Latitudinal extent also helps explain variations in climate, day length, vegetation, and temperature across the country.