A transboundary river rises in the Tibetan Plateau, flows eastwards through a deep valley, takes a sharp bend around the eastern Himalayas and enters India through Arunachal Pradesh. After traversing Assam, its principal channel enters Bangladesh, where it is known by another name before joining the Ganga system. Which one of the following rivers is best described in the passage given above?

The correct answer is Option 1 . Key Points The passage describes the Brahmaputra River , one of the major transboundary rivers of Asia. It flows through China, India and Bangladesh under different regional names. The river rises in the Tibetan Plateau , where it is known as the Yarlung Tsangpo . It initially flows eastwards, roughly parallel to the Himalayan ranges. Near Namcha Barwa , the river takes a sharp bend around the eastern Himalayas and flows through a deep gorge before entering India through Arunachal Pradesh . In Arunachal Pradesh, it is known as the Siang or Dihang . After receiving tributaries such as the Dibang and Lohit , it became known as the Brahmaputra in Assam. On entering Bangladesh, its principal channel is called the Jamuna . It later joins the Ganga, known as the Padma in Bangladesh , and subsequently merges with the Meghna before entering the Bay of Bengal. Therefore, the river described in the passage is the Brahmaputra . Therefore, Option A is correct. Additional Information The Brahmaputra is known as the Yarlung Tsangpo in Tibet , Siang or Dihang in Arunachal Pradesh , and Jamuna in Bangladesh . The river forms the great Tsangpo Gorge near Namcha Barwa before entering India. Its major north-bank tributaries include the Subansiri, Kameng, Manas and Sankosh . Its major south-bank tributaries include the Burhi Dihing, Dhansiri, Kopili and Kulsi . The Brahmaputra carries a very high sediment load , causing frequent channel shifting and the formation of river islands. Majuli , located in Assam, is one of the world’s largest inhabited river islands.