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
A young basketball player with ht 188 cm and arm span 197 cm has a diastolic murmur best heard in second right intercostal space: likely cause of murmur is: 
Select and explain. 
A. AS, B. Coarctation of aoa, C. AR, D. MR
C: AR
Answer: C: AR 
Explanation: Answer is C (A.R.) A diastolic murmur in second right intercostals space in a patient of Marfan's syndrome suggests a diagnosis of Aoic Regurgitation.