Which river rises in the Western Ghats and flows into the Bay of Bengal through the Karnataka-Andhra Pradesh region?

Correct answer: Krishna

The correct answer is the Krishna. It rises near Mahabaleshwar in the Western Ghats of Maharashtra and flows generally eastward across the Deccan Plateau through parts of Karnataka and Andhra Pradesh, now largely associated with Andhra Pradesh and Telangana, before entering the Bay of Bengal. The Krishna is therefore an east-flowing peninsular river. Mahi, Narmada, and Sabarmati flow westward and ultimately drain into the Arabian Sea. The combination of Western Ghats origin, the Karnataka–Andhra region, and an outlet in the Bay of Bengal identifies option A without ambiguity.