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
Least common cause of endocarditis is 
Select and explain. 
A. A.S.D., B. P.D.A., C. T.O.F., D. V.S.D.
A: A.S.D.
Answer: A: A.S.D. 
Explanation: None