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: Medicine
[{'content': "Aoic regurgitation does NOT occur in : \nSelect and explain. \nA. Acute MI, B. Marfan's syndrome, C. Rheumatic hea disease, D. Infective endocarditis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Acute myocardial infarction) Amongst the options provided Acute MI is most unlikely to produce Aoic regurgitation. Acute MI is the single best answer of exclusion.', 'role': 'assistant'}]