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
[{'content': 'According to national health policy, a subcentre caters to population in hilly and tribal areas – \nSelect and explain. \nA. 3000, B. 5000, C. 1000, D. 2500', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sub-centre \n\nThe sub-centre is the peripheral outpost of the existing healthy delivery system in rural areas.\nThey are being established : -\n\n\nOne sub-centre for every 5000 population in general.\nOne sub-centre for every 3000 population in hilly, tribal & backward area.', 'role': 'assistant'}]