Pediatrics C.V.S 1e65ccaf Obstruction in pulmonary stenosis may occur at the following sites ___________ A Supravalvular B Valvular C Subvalvular D All of the above High-Yield Explanation In PS obstruction can be supravalvular,valvular, subvalvular. Ref : Ghai essential of pediatrics eighth edition, p.no:433