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
Tetralogy of fallot is characterized by following except 
Select and explain. 
A. AS, B. VSD, C. Over-riding of aoa, D. Infundibular constriction
A: AS
Answer: A: AS 
Explanation: TOF consist of right ventricular hyperophy, pulmonary stenosis, VSD,overriding of aoa Ref : Ghai essential of pediatrics eighth edition,p.no:420