Which of the following rivers forms the boundary between India and Nepal along their western frontier before merging with the Ghaghara River?

💡 Solution & Explanation

The Kali River, also known as the Sharda or Mahakali River, originates in the Himalayas and marks the western international boundary between India and Nepal before joining the Ghaghara River. Other Himalayan rivers like the Kosi and Gandak flow through different regions of Nepal and Bihar without forming the western frontier.