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': 'Aortic regurgitation is seen in all except- \nSelect and explain. \nA. Rheumatic fever, B. Infective endocrditis, C. Marfan syndrome, D. Myocardial infarction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]