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': '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: Ans. is 'c' i.e., 5000", 'role': 'assistant'}]