The correct answer is: a) Tlawng River.
The Tlawng River is a river in Mizoram, India. It is the longest river in the state, flowing for about 240 kilometers. The Tlawng River is a major source of water for irrigation and hydroelectric power in Mizoram.
The Kolodyne River is a river in Mizoram, India. It is a tributary of the Tlawng River. The Kolodyne River is about 100 kilometers long.
The Tuirial River is a river in Mizoram, India. It is a tributary of the Tlawng River. The Tuirial River is about 80 kilometers long.
The Barak River is a river in India and Bangladesh. It is the longest river in the Barak Valley. The Barak River is about 370 kilometers long.
The Tlawng River is the only river among the given options that is located in Mizoram. The Kolodyne River, Tuirial River, and Barak River are all located in other states of India.