Yamuna river after coursing through Doon valley merges with Ganga at:

Correct option is B

Correct Answer: (b) Triveni Sangam
Explanation:
→ After flowing through the Doon valley, the Yamuna finally joins the Ganga at Triveni Sangam (Prayagraj).
→ The Sangam is a confluence of Ganga, Yamuna, and mythical Saraswati.
Information Booster:
→ It is an important hydrological and cultural site of India.
Additional Information:
(a), (c), (d): Not the location where Yamuna meets Ganga.