This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cyanotic Congenital Heart Disease, Subject name: Pediatrics
[{'content': 'Differentia] cyanosis occurs in which disease - \nSelect and explain. \nA. Severe coarctation, B. Inturrupted aortic arch, C. PPHN, D. All of above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All of above Differential cyanosis -o With normally related great arteries, oxygen saturation may be higher in the upper than lower extremity' in patients if there is right-to-left shunting through the ductus arteriosus.# Seen with severe coarctation or interrupted aortic arch.#. May also occur in patients persistent pulmonaiy hypertension of the newborn.o The differential effect is reduced if there is also right-to-left shunting at the level of the foramen ovale, or if there is left-to-right shunting across coexisting ventricular septal defect", 'role': 'assistant'}]