Explanation:

Let’s break this down together:

- Kangsabati: This river doesn’t flow into the Damodar. Instead, it joins the Rupnarayan further downstream.

- Shilabati: Same story—Shilabati is a tributary of Kangsabati, not Damodar.

- Rupnarayan: It isn’t a tributary of Damodar. In fact, it actually gets water from Kangsabati.

- Barakar: This is the main tributary of the Damodar river. It’s a significant one too, joining the Damodar in Jharkhand.