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: Pediatrics
Wide fixed S2 is seen in __________ 
Select and explain. 
A. ASD, B. VSD, C. PDA, D. All of the above
A: ASD
Answer: A: ASD 
Explanation: Widely split S2 seen in ASD. Ghai essential of pediatrics, eighth edition, p.no:413