Consider the following pairs:
| River | Flows into |
| 1. Amazon | Atlantic Ocean |
| 2. Mississippi-Missouri | Caspian Sea |
| 3. Volga | Gulf of Mexico |
| 4. Indus | Arabian Sea |
How many pairs given above is/are correctly matched?
1
Only one pair
2
Only two pairs
3
Only three pairs
4
All four pairs