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': 'To reduce moality by CHD, best strategy ? \nSelect and explain. \nA. Primordial prevention, B. Secondary prevention, C. Teiary prevention, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Primordial prevention Best way to prevent moality from any disease is to prevent the development of disease. In case of CHD, primordial prevention is best strategy, which mainly concerns with life style changes.", 'role': 'assistant'}]