(3) Brahmaputra Explanation: The Brahmaputra also called Tsangpo-Brahmaputra, is a trans-boundary river. It originates in Tibet as the Yarlung Tsangpo River, from where it flows across southern Tibet to Arunachal Pradesh (India), where it is known as Dihang or Siang. It flows southwest through the Assam Valley as Brahmaputra and south through Bangladesh as the Jamuna.