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
[{'content': 'Tetralogy of fallot is characterized by following except \nSelect and explain. \nA. AS, B. VSD, C. Over-riding of aoa, D. Infundibular constriction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: TOF consist of right ventricular hyperophy, pulmonary stenosis, VSD,overriding of aoa Ref : Ghai essential of pediatrics eighth edition,p.no:420', 'role': 'assistant'}]