Q. The Rapti River, recently in the news, is the most important tributary of which of the following rivers?
Answer: C
Notes:
Explanation: The Rapti River is the most important left-bank tributary of the Ghaghara River. It originates in Nepal, flows through Uttar Pradesh, and ultimately joins the Ghaghara, which is itself a major tributary of the Ganges River.
Source- DTE

