With reference to river Teesta, consider the following statements:1.The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim.2.River Rangeet originates in Sikkim and it is a tributary of river Teesta.3.River Teesta flows into Bay of Bengal on the border of India and Bangladesh.Which of the statements given above is/are correct?

1. A

   1 and 3 only

   (a) 1 and 3 only. Teesta does not share the Brahmaputra’s source, and it meets the Brahmaputra in Bangladesh rather than entering the Bay of Bengal on the India–Bangladesh border. Both 1 and 3 fail.

2. B

   2 only

   (b) 2 only. The Rangeet (Rangit) rises in Sikkim and joins the Teesta. That tributary fact is correct; 1 and 3 are not. This is the official key.

3. C

   2 and 3 only

   (c) 2 and 3 only. Statement 3 is wrong on the Bay-of-Bengal border mouth. Not the key.

4. D

   1, 2 and 3

   (d) 1, 2 and 3. Source and mouth claims are false.

Summary. Official key is (b) 2 only. Teesta rises in the eastern Himalaya (Tso Lhamo / Pauhunri region of Sikkim), not at the Brahmaputra’s Tibetan source. Rangeet is a major Sikkim tributary of the Teesta. After Jalpaiguri the river enters Bangladesh and joins the Brahmaputra (Jamuna)–Padma system rather than meeting the Bay exactly on the India–Bangladesh shore. Only the Rangeet statement stands.