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
[{'content': 'Ductus dependent blood flow is required for all of these congenital hea diseases except ? \nSelect and explain. \nA. Persistent truncus aeriosus, B. Hypoplastic left hea syndrome, C. Pulmonary stenosis, D. TGA with intact ventricular septum', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' i.e., Persistent truncus aeriosus", 'role': 'assistant'}]