Q1. Which one of the following west-flowing rivers has the largest catchment area?
Explanation
Mahi has the largest catchment area among these west-flowing rivers. It rises in Madhya Pradesh, flows through Rajasthan and Gujarat, and drains a much wider basin before meeting the Gulf of Khambhat. Periyar is an important Kerala river but its basin is comparatively smaller and confined mainly to the Western Ghats and adjoining lowlands. Sabarmati also drains into the Gulf of Khambhat, yet its catchment is smaller than Mahi's. Bharathappuzha is Kerala's major river system, but its drainage area is still less than that of Mahi.
