Tsangpo river of Tibet, in India, is known as

A river's name often changes as it crosses international borders and merges with major tributaries — the same channel of water carries different local names in different countries and even different regions of the same country, even though it remains hydrologically continuous. The river that rises in Tibet (China) as the Yarlung Tsangpo flows east and then turns south into Arunachal Pradesh, where it is called the Siang (or Dihang). After it is joined by the Dibang and Lohit rivers in Assam, the combined channel is known as the Brahmaputra, which then flows on into Bangladesh as the Jamuna before joining the Ganga. So the Tsangpo of Tibet is, in India, the same river as the Brahmaputra.

• Ganga rises separately at Gangotri in the Indian Himalayas (Uttarakhand) and has no connection to the Tibetan Tsangpo.

• Yamuna rises at Yamunotri and is a tributary of the Ganga, not of the Tsangpo–Brahmaputra system.

• Indus also originates near Mount Kailash in Tibet but flows west through Ladakh into Pakistan — an entirely separate river system from the Tsangpo.

So the correct match is Brahmaputra — the Indian name for the river that enters as the Tibetan Tsangpo.