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
A neonate presenting with heart failure on day 7 of life has this chest X-ray. What is the most probable diagnosis? 
Select and explain. 
A. TOF, B. VSD, C. TAPVC, D. TGA
D: TGA
Answer: D: TGA 
Explanation: d. TGAChest X-ray showing 'egg on side' appearance in a neonate presenting with heart failure on day 7 of life has TGA (Transposition of great arteries)