Step 1: Concept of Common Heritage of Mankind.
The principle applies to areas beyond national jurisdiction such as the Moon and outer space (Outer Space Treaty, 1967) and the deep seabed (UNCLOS, 1982).
Step 2: Clarification.
- High seas are governed by the principle of freedom, not common heritage.
- Antarctica is regulated by the Antarctic Treaty System, not common heritage.
Step 3: Conclusion.
Hence, the correct answer is (b) 1 and 3.