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
Cyanosis is seen in - 
Select and explain. 
A. Persistent ductus aeriosus, B. Tricuspid atresia, C. Ostium primumASD, D. All
B: Tricuspid atresia
Answer: B: Tricuspid atresia 
Explanation: Ans. is 'b' i.e., Tricuspid atresia