Reversal of shunt is not possible in the natural history of: (A) ASD, (B) TOF, (C) VSD, (D) PDA
Answer is B. Eisenmenger's syndrome or reversal of shunt is seen in the ventricular septal defect, atrial septal defect, or less commonly, patent ductus aeriosus. ref - Harrisons internal medicine 20e pg 393,1838