Which of the following is the only left tributary of Barak river?

Jatinga River
Sonai River
Jiri River
Machura River

The correct answer is D. Machura River.

The Barak River is a river in the northeastern Indian states of Assam and Tripura. It is the largest river in the Barak Valley and the second largest river in Assam after the Brahmaputra. The Barak River originates in the Manipur Hills and flows through the states of Assam and Tripura before joining the Meghna River in Bangladesh. The Barak River is a major source of water for irrigation and drinking water in the Barak Valley. It is also a popular destination for fishing and boating.

The Machura River is a tributary of the Barak River. It originates in the Manipur Hills and flows through the states of Assam and Tripura before joining the Barak River near Silchar. The Machura River is a major source of water for irrigation and drinking water in the Barak Valley. It is also a popular destination for fishing and boating.

The other options are incorrect because they are not tributaries of the Barak River.

A. Jatinga River is a tributary of the Brahmaputra River.
B. Sonai River is a tributary of the Barak River.
C. Jiri River is a tributary of the Brahmaputra River.