To determine the source of the idea of suspending Fundamental Rights during an emergency in the Indian Constitution:
1. The Indian Constitution borrowed the concept of suspending Fundamental Rights during an emergency from the Constitution of the USSR.
2. This provision allows the government to suspend certain rights to maintain order during national emergencies.
3. The other options, while having their own constitutional frameworks, do not specifically influence this aspect of the Indian Constitution.
Therefore, the correct answer is (4) USSR.