Question

Which river does not constitute the Bay of Bengal drainage system?
A. Banas
B. Berach
C. Kalisindh
D. Mahi

Answer 1

Hint: River Som, Anas and Panam are major tributaries of this river. It is one of the few west flowing rivers of India. Aravali hills form the north and north-west boundary of the river.

Complete Answer:
- Banas river entirely flows in Rajasthan (longest river of Rajasthan). Being a seasonal river it dries up in summers. Its total length is about 512 kilometres. The river runs in a south-western direction and its mouth is at the confluence of this river and Chambal river as its tributary.
- The source of Berach river is located in Udaipur district of Rajasthan. After flowing in the northeast direction for the distance of about 157 km, it drains its water in Banas river, thus becoming its tributary.
- Kalisindh river, flowing in Rajasthan and Madhya Pradesh for a total distance of 550 kilometres, rises in Vindhyan Ranges. It drains its water in the Chambal river. It is the biggest river flowing in the Malwa region of Madhya Pradesh.
- Mahi river flows in three states i.e. Madhya Pradesh, Rajasthan and Gujarat and originates from Vindhya Ranges. It is one of the few west flowing rivers of India. It drains its water near the Gulf of Khambhat into the Arabian Sea. Thus it does not constitute the Bay of Bengal drainage system.

The correct answer is option D.

Note: Narmada, Tapti and Sabarmati are the important west-flowing rivers, which drain their water in the Arabian Sea. In India, Mahi river is the only river that crosses the Tropic of Cancer twice, first in Madhya Pradesh and then in Gujarat.