This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
7 day old baby presented in emergency department with unconsciousness, cyanosis and 85% oxygen saturation. The diagnosis – a)  Tetralogy of fallotb)  TGAc)  TAPVCd)  PDA 
Select and explain. 
A. a, B. bc, C. ac, D. ad
B: bc
Answer: B: bc 
Explanation: This child has cyanosis at birth (within 7 days).
Congenital heart diseases which present with cyanosis at birth are : TGA, TAPVR, Tricuspid atresia, pulmonary atresia, Ebstein anomaly.
In TOF cyanosis usually presents after neonatal period (after 28 days).