Which river in Bihar creates an 80 metre high waterfall at the edge of the Rohtas Plateau?

Q. Which river in Bihar creates an 80 metre high waterfall at the edge of the Rohtas Plateau?
Answer: Durgavati River
Notes: The Durgavati River, a tributary of the Karmanasa in Bihar, forms the 80 m high Durgavati Falls at the edge of the Rohtas Plateau. This waterfall is a major geographical feature in the Kaimur district and is associated with the Durgavati Reservoir (Karamchat Dam).