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 young basketball player with ht 188 cm and armspan 197 cm has a diastolic murmur best heard in second right intercostal space : likely cause of murmur is- \nSelect and explain. \nA. AS, B. Coarctation of aoa, C. AR, D. MR', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The murmur of chronic AR is typically a high-pitched, blowing, decrescendo diastolic murmur, heard best in the third intercostal space along the left sternal border. Since the patient has armspan more than height Murfan&;s syndrome is suspected. Most common valvualr hea disease associated with Murfan&;s syndrome is AR. ( Harrison&;s principle of internal medicine,18th edition)', 'role': 'assistant'}]