From origin to the delta, the Brahmaputra traverses – (1) Tibet, China and Myanmar (Burma) (2) Bhutan, Nepal and India (3) China, India and Bangladesh (4) India, Bangladesh and Myanmar (Burma)
(3) China, India and Bangladesh Explanation: The Brahmaputra River is a transboundary river. With its origin in the Angst Glacier, located on the northern side of the Himalayas in Burang County of China's Tibet Autonomous Region as the Yarlung Tsangpo River, it flows across southern Tibet to break through the Himalayas in great gorges and into Arunachal Pradesh. It flows southwest through the Assam Valley as Brahmaputra and south through Bangladesh as the Jamuna.