Rail connectivity is limited in Manipur, with the nearest major railway station located in:

Dimapur (Nagaland)
Silchar (Assam)
Guwahati (Assam)
Kohima (Nagaland)

The correct answer is Dimapur (Nagaland).

Dimapur is the nearest major railway station to Manipur. It is located in the Nagaland state of India. The railway station is well-connected to other major cities in India, such as New Delhi, Kolkata, and Chennai. It is also well-connected to the other major cities in Nagaland, such as Kohima and Mokokchung.

The other options are incorrect because they are not major railway stations. Silchar is a small town in the Assam state of India. It is not a major railway station. Guwahati is a major city in the Assam state of India. It is a major railway station, but it is not the nearest major railway station to Manipur. Kohima is the capital of the Nagaland state of India. It is not a major railway station.