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': 'Bisiferien pulse is seen in - \nSelect and explain. \nA. AS+AR, B. Hyperophic cardiomyopathy, C. Severe AR, D. All of above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Bisferiens pulse: This is a pulse with double peak, both being felt in systole. Mechanism: This is due to a combination of the slow rising pulse and collapsing pulse. Ref: Harrison 20,th edition pg 1445', 'role': 'assistant'}]