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
Infective endocarditis is least likely to occur in: 
Select and explain. 
A. VSD, B. ASD, C. Tetralogy of Fallot, D. Coarctation of aorta
B: ASD
Answer: B: ASD 
Explanation: None