This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health care of community & international health, Subject name: Social & Preventive Medicine
[{'content': 'A sub-centre caters the needs of ---- population - \nSelect and explain. \nA. 30000, B. 15000, C. 5000, D. 10000', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The subcenter is the peripheral outpost of the existing health delivery system in rural areas.They are being established on the basis of one subcenter for every 5000 population in general and one for every 3000 population in hilly and tribal areas (refer pgno:902 park 23 rd edition)', 'role': 'assistant'}]