All of the following statements about Tetralogy of fallot are true, Except

Answer is D (First Hea Sound is soft) The murmur in tetralogy of Fallot relates to the degree of right ventricular outflow obstruction (pulmonic stenosis). It is a harsh ejection systolic murmur resulting from turbulent flow across the stenotic pulmonic valve The shunt murmur is absent because the shunt operates at a low pressure difference