The “Bogibeel Bridge,” India’s longest rail-cum-road bridge, is built across which river?

Brahmaputra
Barak
Dhansiri
Jiadhal

The correct answer is: a) Brahmaputra.

The Bogibeel Bridge is a rail-cum-road bridge over the Brahmaputra River in the Indian state of Assam. It is the longest bridge in India and the third longest rail-cum-road bridge in the world. The bridge was opened to traffic in 2016 and has significantly improved connectivity between the north and south banks of the Brahmaputra.

The other options are incorrect because they are not rivers in Assam. The Barak River is located in the state of Manipur, the Dhansiri River is located in the state of Nagaland, and the Jiadhal River is located in the state of Arunachal Pradesh.