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
A subcentre in a hilly area caters to a population of: 
Select and explain. 
A. 1000, B. 2000, C. 3000, D. 5000
C: 3000
Answer: C: 3000 
Explanation: Subcentres are established on the following basis: One subcentre for every 5000 population is general. One subcentre for every 3000 population in hilly, tribal and backward areas. Ref:Parks Textbook of Preventive and Social Medicine By K.Park, 18th Edition, Page 696