Which major river of Sikkim originates from the Rathong glacier and flows southward before merging with the Teesta River at Melli?

💡 Solution & Explanation

The Rangeet River is the largest tributary of the Teesta River, originating from the Rathong glacier near Mount Kangchenjunga and forming a natural border between Sikkim and West Bengal before their confluence at Melli. Subansiri, Manas, and Kameng are major tributaries of the Brahmaputra River system in Arunachal Pradesh and Assam. The Rangeet river basin is vital for hydropower projects and supports fertile agricultural valleys in western and southern Sikkim.