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
"Egg on side appearance" is seen in - 
Select and explain. 
A. Fallot's tetralogy, B. Transposition ofgreatvessels, C. Ebstein's anomaly, D. Ventricular septal defect
B: Transposition ofgreatvessels
Answer: B: Transposition ofgreatvessels 
Explanation: Ans. is 'b' i.e., Transposition of great vessels