If you have to travel from the northernmost to the southernmost points in the mainland of India, you would cover a distance of about:

Correct option is B

The northernmost point of mainland India is Indira Col in the Union Territory of Ladakh, while the southernmost point of mainland India is Kanyakumari (Tamil Nadu).

• The approximate distance between Indira Col (Ladakh) and Kanyakumari (Tamil Nadu) is 3,214 km, which is often rounded to 3,200 km in general references.
• This measurement considers straight-line distance but may vary slightly based on route taken.

Thus, the correct answer is: 3,200 km. 

Information Booster

• Northernmost Point of Mainland India: Indira Col, Ladakh (37°06′N latitude).
• Southernmost Point of Mainland India: Kanyakumari, Tamil Nadu (8°04′N latitude).
• The total latitudinal extent of India is about 30° (from 8°N to 37°N).
• The distance between the easternmost (Arunachal Pradesh) and westernmost (Gujarat) points of India is about 2,933 km.