<prompt> A 2 weeks baby with central cyanosis has grade II systolic murmur, normal S1, single S2, plethoric lung. What is the diagnosis?TGATAPVCTOFPulmonary atresia  <response>: a. TGARef: Nelsons 20e p 2211-2217, Ghai 8e p 420-423The given clinical picture suggests a diagnosis of TGA Transposition of great arteriesIn TOF and Pulmonary atresia, pulmonary vascularity is decreasedIn TAPVC, S2 is not single, rather there is a wide fixed split of the 2nd heart sound. 