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': 'In Vision 2020. Ophthalmic personnel per population ratio is - \nSelect and explain. \nA. 5000, B. 10000, C. 50000, D. 1 lac', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans is 'c' i.e. 50000", 'role': 'assistant'}]