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
[{'content': 'A 2 weeks baby with central cyanosis has grade II systolic murmur, normal S1, single S2, plethoric lung. What is the diagnosis? \nSelect and explain. \nA. TGA, B. TAPVC, C. TOF, D. Pulmonary atresia', 'role': 'user'}, {'content': "Answer: A \nExplanation: a. TGA(Ref: Nelson's 20/e p 2211-2217, Ghai 8/e p 420-423)The given clinical picture suggests a diagnosis of TGA (Transposition of great arteries)In 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.", 'role': 'assistant'}]