This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
What is the mechanism of aoic regurgitation in a case of VSD? 
Select and explain. 
A. Prolapse of right coronary leaflet, B. Changes in the pressure gradient due to left to right shunt, C. Eisenmengerization, D. Congenital defect
A: Prolapse of right coronary leaflet
Answer: A: Prolapse of right coronary leaflet 
Explanation: Aoic regurgitation in VSDIt is a rare association seen in around 5% of VSDsIt is due to prolapse of the right coronary or non-coronary leaflet of the aoic valve or bothCommon when the defect is in the infundibular septum.(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 2194 - 2195)