This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Each primary health centre is meant to serve a population of: 
Select and explain. 
A. 1000, B. 5000, C. 10000, D. 30000
D: 30000
Answer: D: 30000 
Explanation: Each PHC is meant to serve 30000 population in rural area in plains, while it serves 20000 population in hilly, tribal and backward areas. Ref: Park 22nd edition pg: 845.