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
7 day old baby presented in emergency depament with unconciousness, cyanosis and 85% oxygen saturation. The diagnosis _______ 
Select and explain. 
A. Tetrology of fallot, B. TGA, C. TAPVC, D. PDA
B: TGA
Answer: B: TGA 
Explanation: In TGA there will be decreased oxygen saturation,cyanosis. Ref : Ghai essential of pediatrics, eighth edition, p.no:424