This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
The following features are true for tetralogy of Fallot, except 
Select and explain. 
A. Ventricular septal defect, B. Right ventricular hyperophy, C. Atrial septal defect, D. Pulmonary stenosis
C: Atrial septal defect
Answer: C: Atrial septal defect 
Explanation: Tetrology of fallot characterized by right ventricular outflow obstruction( pulmonary stenosis),right ventricular hyperophy,VSD,aoa that override the VSD. Ref : Ghai essential of pediatrics, 8th edition, p.no:420 ; Harrison principals of internal medicine,19th edition,p.no:1526