Explanation:

Doab is a term used in India and Pakistan for the "tongue," or tract of land lying between two converging, or confluent, rivers. It is similar to an interfluve. In simple words, a region lying between and reaching to the confluence of two rivers.
•Bist Doab is the region of Punjab, India that lies between the Beas River and the Sutlej River.
•The Bari Doab lies between the Ravi and the Beas rivers.
The Maithon Dam located at Maithon, 48 km from Dhanbad, in the state of Jharkhand - is constructed on the Barakar River. (Not Barak River)
The Gandhi Sagar Dam is one of the four major dams built on India's Chambal River. The dam is located in the Mandsaur Neemuch district of the state of Madhya Pradesh.
Do you know?
•Gandhi Sagar dam, Rana Pratap Sagar dam, Jawahar Sagar Dam and Kota barrage are the four major dams built on India's Chambal River.
•The Barakar River is the main tributary of the Damodar River in eastern India. Whereas, the Barak River is one of the major rivers of South Assam and is a part of the Surma-Meghna River System. It rises in the hill country of Manipur State, where it is the biggest and the most important of the hill country rivers.
Think!
•Try to identify other important reservoirs, dams and associated rivers.