Consider the following rivers: 1. Betwa 2. Kosi 3. Gandak Which of the above join(s) Yamuna river?

The Yamuna river, the longest tributary of the Ganga, originates from the Yamunotri glacier [2]. Its major right-bank tributaries include the Chambal, Sind, Betwa, and Ken [3]. Specifically, the Betwa river flows northward from the Vindhyan range to join the Yamuna [3]. In contrast, the Kosi and Gandak are major left-bank tributaries of the Ganga river itself, not the Yamuna [2][t1]. The Kosi and Gandak originate in the Himalayas (Nepal) and discharge directly into the Ganga [2][t3]. While the Yamuna is a tributary of the Ganga, it maintains its own distinct sub-basin with specific tributaries like the Betwa [t1]. Therefore, among the options provided, only the Betwa joins the Yamuna river.

Sources

1. [2] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 3: Drainage System > Do you Know? > p. 22
2. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > The Yamuna River > p. 13
3. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > 1.2 Subsequent Rivers > p. 1