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': "Calcification of the aoic valve is seen in : \nSelect and explain. \nA. Aoic stenosis, B. Aoic regurgitation, C. Marfan's syndrome, D. Hurler's syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Aoic Stenosis) Aoic calcification is most commonly associated with Aoic stenosis Aoic Calcification in Aoic stenosis is usually apparent on fluoroscopic examination with an image intensifier or by echocardiography. The absence of aoic calcification in an adult suggests that severe valvular Aoic stenosis is not present.', 'role': 'assistant'}]