This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Obstruction in pulmonary stenosis may occur at the following sites - \nSelect and explain. \nA. Supravalvular, B. Valvular, C. Subvalvular, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All of the above o Anatomically, Pulmonary stenosis may be located at : 1. Valvular level 2. Subvalvular level : also called infundibular pulmonic stenosis. 3. Supra valvular level : this is uncommon and refers to stenosis above the valve.", 'role': 'assistant'}]