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
Differential Cyanosis occurs in which of the following disease: 
Select and explain. 
A. Severe coarctation, B. PPHN, C. Interrupted aortic arch, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D. All of the aboveDifferential cyanosis can be caused by* Persistent pulmonary hypertension of Newborn* Coarctation of Aorta* Interrupted aortic arch