1. The Indus river originates from which place? 2. Which is the longest river in India? 3. The river known as the 'Sorrow of Bihar' is? 4. The Brahmaputra river enters India in which state? 5. The Tapti river flows into which gulf? 6. Which river forms the famous Dhuandhar Falls? 7. Which river is known as the 'Lifeline of Madhya Pradesh'? 8. Which river is known as 'Dakshin Ganga'? 9. Which is the only major river that flows entirely within India from west to east? 10. Which is the largest peninsular river in India?