The correct answer is option 3 - 3200 km. This means that the approximate North-South extent of India, from Kashmir to Kanyakumari, is around 3200 km.

To understand this better, it is important to note that Kashmir is located in the northernmost part of India, while Kanyakumari is in the southernmost part. The North-South extent refers to the distance between these two points, measuring how far apart they are from each other in terms of latitude.

In this case, the distance is estimated to be approximately 3200 km. It is important to remember that this is an approximation and might vary slightly depending on the specific points chosen as the start and end locations. However, the given answer of 3200 km provides a good estimate of the North-South extent of India.