Consider the following pairs:
| Oceanic Trenches | Region |
| 1. Mariana trench | Pacific ocean |
| 2. Puerto Rico trench | Atlantic ocean |
| 3. Eurasia basin | Indian ocean |
| 4. Java trench | Arctic ocean |
Which of the pairs given above are correctly matched?
1
1, 2 and 4 only
2
1 and 2 only
3
3 and 4 only
4
1, 2, 3 and 4