1. The Sabarmati river flows through which major city? 2. Which is the longest river in India? 3. The Krishna river originates from which state? 4. The Tapti river flows into which gulf? 5. The river known as the 'Sorrow of Bihar' is? 6. Which river is famous for the Sundarbans Delta? 7. Which river is known as 'Dakshin Ganga'? 8. Which is the only major river that flows entirely within India from west to east? 9. The Yamuna river is a tributary of which river? 10. The Cauvery river originates from which hills?