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
A new born presents with deepening cyanosis at bih, with congestive hea failure and normal first hea sound. X-ray reveals cardiomegaly diagnosis is - 
Select and explain. 
A. Tetralogy of fallot's, B. Ebstein anomally, C. Transposition of great vessels, D. Tricuspid atresia
C: Transposition of great vessels
Answer: C: Transposition of great vessels 
Explanation: Ans. is 'c' i.e., Transposition of great vessels