The correct answer is: d) Disang.
The Disang is a major tributary of the Brahmaputra River that flows through Nagaland. It is the largest tributary of the Brahmaputra in Nagaland, and it is also the longest tributary of the Brahmaputra in India. The Disang River originates in the Patkai Hills in Nagaland, and it flows for about 500 kilometers before it joins the Brahmaputra River in Assam. The Disang River is a major source of water for irrigation and drinking water in Nagaland. It is also a popular destination for fishing and boating.
The other options are incorrect because they are not major tributaries of the Brahmaputra River that flow through Nagaland.
- Option a) Dikhow is a tributary of the Brahmaputra River that flows through Assam.
- Option b) Dhansiri is a tributary of the Brahmaputra River that flows through Assam and Nagaland.
- Option c) Dihing is a tributary of the Brahmaputra River that flows through Assam.