The correct option is A China
The river Brahmaputra is known as Tsang Po in Tibet and Jamuna in Bangladesh. It rises in Tibet east of Mansarovar lake very close to the sources of the Indus and the Satluj. On reaching to Namcha Barwa(7757 m), it takes "U" turn and enters in India in Arunachal Pradesh through a gorge. Here it is called the Dihang.