system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Obstruction in pulmonary stenosis may occur at the following sites ___________
assistant
The correct answer is  In PS obstruction can be supravalvular,valvular, subvalvular. Ref : Ghai essential of pediatrics eighth edition, p.no:433