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: Surgery
[{'content': "Murmur increasing with valsalva maneouvre aEUR' \nSelect and explain. \nA. Mitral stenosis, B. HOCM, C. VSD, D. Aoic stenosis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: HOCM EFFECT OF VARIOUS INTERVENTIONS ON SYSTOLIC MURMURS', 'role': 'assistant'}]