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
Which among the following is the least common cause of infective endocarditis? 
Select and explain. 
A. ASD, B. MS, C. VSD, D. AR
A: ASD
Answer: A: ASD 
Explanation: Among the following, ASD is the least common cause of infective endocarditis. Here the low turbulence is responsible for decreased incidence of IE.