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': 'Pulsus bisfriens is seen in all except: March 2012 \nSelect and explain. \nA. Mitral valve prolapse, B. Aoic stenosis with aoic regurgitation, C. Severe aoic regurgitation, D. HOCM', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A i.e. Mitral valve prolapse The bisferiens pulse, which has two systolic peaks, is characteristic of aoic regurgitation (with or without accompanying stenosis) and of hyperophic cardiomyopathy.', 'role': 'assistant'}]