Which river joins the Siang River at a massive confluence near Bogibeel in Assam after originating in the easternmost mountains of Arunachal Pradesh?

💡 Solution & Explanation

The Lohit River, originating from the Zayal Chu range in Tibet and flowing through the eastern districts of Arunachal Pradesh, merges with the combined waters of the Siang and Dibang to form the massive Brahmaputra channel near the Assam border. Kameng and Subansiri join further west, while the Tawang River is a tributary of the Kameng basin. The Lohit is historically referred to as the river of blood due to its reddish lateral soil runoff.