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
[{'content': "Radiofemoral delay is characteristic of ____________ \nSelect and explain. \nA. Patent ductus aeriosis, B. Coarctation of aoa, C. Aoic dissection, D. Takayasu's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: In coarctation of aoa there will be radiofemoral delay. Ref : Ghai essential of pediatrics, eighth edition, p.no:432', 'role': 'assistant'}]