Explanation:

Only statement 2nd is correct.

• The Brahmaputra River takes a sharp U-turn near Mount Namcha Barwa in Tibet. This U-turn, also known as the "Great Bend," occurs as the river flows around Namcha Barwa before entering Arunachal Pradesh in India. 

• In Tibet, the Brahmaputra River is called the Yarlung Tsangpo River. It originates from the Angsi Glacier near Mount Kailash and flows eastward through Tibet before making its U-turn and entering India. 

Hence option 2nd is correct.