Consider the following pairs:
| Rivers | Flow into |
| 1. Dnieper River | Black Sea |
| 2. Danube River | North Sea |
| 3. Don River | Aral Sea |
| 4. Dniester River | Aegean Sea |
How many pairs given above are correctly matched?
1
Only one pair
2
Only two pairs
3
Only three pairs
4
All four pairs