This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
what is likely diagnosis of following CXR? 
Select and explain. 
A. TOF, B. TAPVC, C. VSD, D. ASD
A: TOF
Answer: A: TOF 
Explanation: Tetralogy of fallot Commonest cyanotic congenital hea disease in children above the age of two years constituting almost 75 % of all blue patients. Four constituents of tetra logy as described originally by Fallot consist of :- * 1. Ventricular septa! defect (VSD) # 2. Pulmonic stenosis # 3. overriding or dextroposed aoa, and # 4. Right ventricular hyperophy REF : HARRISONS 21ST ED