<prompt> Obstruction in pulmonary stenosis may occur at the following sites :SupravalvularValvularSubvalvularAll of the above  <response>: Answer is D All of the above Pulmonic stenosis may occur at valvular, supravalvular and subvalvular level. Anatomically, Pulmonary stenosis may be located at: Valvular level Subvalvular level : This is also called Infundibular pulmonary stenosis. Supravalvular level : This is also called Peripheral pulmonary stenosis.. 