Correct Answer: (c) Uttarkashi
Solution:The prime tributary of Ganga river is Bhagirathi which originates from Gomukh, Uttarkashi district in Uttarakhand. The confluence of Alaknanda and Bhagirathi at Devprayag forms river Ganga. Thus, Uttarkashi is related to Bhagirathi not Ganga. Fatehpur, Bhagalpur, and Kanpur are located on the bank of river Ganga.