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': 'Systolic murmur in TOF is due to ? \nSelect and explain. \nA. VSD, B. Pulmonary stenosis, C. ASD, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ejection systolic murmur in TOF is due to pulmonary stenosis. Ref : Ghai essential of pediatrics, eighth edition, p.no:420', 'role': 'assistant'}]