Consider the following pairs.
| S.No | International Boundary | Countries |
| 1. | Siegfried Line | Germany and Finland |
| 2. | Hindenburg Line | Germany and France |
| 3. | 38th Parallel | North Vietnam and South Vietnam |
| 4. | Maginot Line | Cyprus and Germany |
Which among the above pairs is/are correct?
1
1, 2, and 3 only
2
1 and 2 only
3
All are correct
4
No pair is correct