This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'A 73-year-old man has angina pectoris on exertion, but an angiogram reveals noncritical stenosis of the coronary arteries. This occurs most frequently with which of the following valvular heart diseases? \nSelect and explain. \nA. mitral stenosis, B. mitral insufficiency, C. pulmonary stenosis, D. aortic stenosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In the absence of critical CAD, angina pectoris occurs most frequently with aortic stenosis. AMI is usually due to associated atherosclerotic coronary occlusion.', 'role': 'assistant'}]