<prompt> Systolic murmur in TOF is due to?VSDPulmonary stenosisASDNone  <response>: b. Pulmonary stenosisRef: Nelsons 20e p 2223-2225, Ghai 8e p 424-426Ejection systolic murmur in TOF is due to pulmonary stenosis.The intensity and duration of this systolic murmur is inversely proportional to the severity of TOF. 