Multiple choice Which of the following is not a tributary of the Yamuna? Tons Hindon Chambal Ken Gandak Reveal answer Fill a bubble to check yourself E Correct answer Explanation This is the correct answer. The Gandak rises in the Nepal Himalayas between the Dhaulagiri and Mount Everest and enters the Ganga plain in Champaran district of Bihar and joins the Ganga at Sonpur near Patna.