At which Prayag do Alaknanda and Pindar meet?

Correct answer: Karnaprayag

The correct answer is Karnaprayag. In the Alaknanda river system, the Pindar River joins the Alaknanda at Karnaprayag in Uttarakhand. This is one of the traditionally recognised Panch Prayag, or five major confluences, of the Alaknanda. The names of the Prayags are often remembered through the joining rivers: Vishnuprayag is associated with the Dhauliganga, Nandprayag with the Nandakini, Karnaprayag with the Pindar, Rudraprayag with the Mandakini, and Devprayag with the Bhagirathi. Therefore, Nandprayag and Devprayag are plausible distractors, but the Pindar connection identifies option B.