Q. Consider the following rivers:
  1. Tons
  2. Betwa
  3. Ken
Which of the above is/are tributary river of the Yamuna?

Answer: 1,2 and 3
Notes: All the given rivers are tributary to Yamuna river.
Ken joins Yamuna at fatehpur Uttar Pradesh
Tons near Dehradun in Uttarakhand
Betwa joins Yamuna near Hamirpur district of Uttar Pradesh.