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
Radiofemoral delay is characteristic of ____________ 
Select and explain. 
A. Patent ductus aeriosis, B. Coarctation of aoa, C. Aoic dissection, D. Takayasu's disease
B: Coarctation of aoa
Answer: B: Coarctation of aoa 
Explanation: In coarctation of aoa there will be radiofemoral delay. Ref : Ghai essential of pediatrics, eighth edition, p.no:432