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 child comes with cyanotic spells and chest X-ray was as shown below; What is the most probable diagnosis? 
Select and explain. 
A. Tetralogy of Fallot, B. Tricuspid atresia, C. Pulmonary atresia with intact ventricular septum, D. TAPVC
A: Tetralogy of Fallot
Answer: A: Tetralogy of Fallot 
Explanation: a. Tetralogy of Fallot(Ref: Nelson's 20/e p 2211-2217,, Ghai 8/e p 420-423)The given history along with chest X-ray finding of Boot shaped heart suggests a diagnosis of Tetralogy of Fallot.