Name the river that forms the southern boundary between Assam and Mizoram.

The correct answer is: a) Tlawng

The Tlawng is a river in India that flows through the states of Assam and Mizoram. It is a tributary of the Barak River, which in turn is a tributary of the Brahmaputra River. The Tlawng forms the southern boundary between Assam and Mizoram.

The Tlawng is a major source of water for irrigation and drinking water in the region. It is also a popular destination for fishing and boating.

The Tlawng is a beautiful river with a rich history and culture. It is an important part of the lives of the people who live in the region.

The other options are incorrect because:

• Option b, Khawthlangtuipui, is a river in Mizoram. It is not a boundary river between Assam and Mizoram.
• Option c, Dhaleswari, is a river in Assam. It is not a boundary river between Assam and Mizoram.
• Option d, Tuivai, is a river in Mizoram. It is not a boundary river between Assam and Mizoram.