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: Medicine
Cyanosis is seen in: March 2013 
Select and explain. 
A. VSD, B. TAPVC, C. VSD, D. PDA
B: TAPVC
Answer: B: TAPVC 
Explanation: Ans. B i.e. TAPVC