Step 1: Understanding federal vs unitary.
- Federal system: Power is divided between central and state governments (e.g., India, Belgium, Switzerland).
- Unitary system: Power is centralized in the national government (e.g., China).
Step 2: Analyze options.
(A) India – Federal (Centre + States).
(B) China – Correct, it follows a unitary system under Communist Party control.
(C) Belgium – Federal, with separate regions and communities.
(D) Switzerland – Federal, with cantonal powers.
Step 3: Conclusion.
The correct answer is (B) China.