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 bisferiens occurs in: September 2005 \nSelect and explain. \nA. HOCM, B. AR, C. AS and AR, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: All of the above Pulsus bisferiens/ bisferious pulse / biphasic pulse Bisferious means striking twice, traditionally pulsus bisferiens is discovered when aoic insufficiency exists in association with aoic stenosis, but may also be found in isolated but severe aoic insufficiency, and hyperophic obstructive cardiomyopathy.', 'role': 'assistant'}]