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': 'National health policy which started before 1960 is/are – a) National Filaria Control Programmeb) National Malaria Control Programmec) National Leprosy Control Programmed) National Tuberculosis Programmee) Goitre Control Programme \nSelect and explain. \nA. ab, B. abc, C. acd, D. bcd', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]