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: Medicine
[{'content': 'Unequal pulse in upper & lower extremeties (i.e., radio-femoral delay) is/are seen in: \nSelect and explain. \nA. Aoic dissection, B. Post-ductal coarctation of aoa, C. Supra-valvular Aoic stenosis, D. Sub-valvular Aoic stenosis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer- (B) Post-ductal coarctation of aoaInquality between Two Radial Pulse (Radio-Radial Delay)Thoracic inlet syndrome (cervical rib' scalene syndrome)Aneurysm of aoaTakayasu's diseasePre-subclan coarctationSuPravalvular aoic stenosisAtherosclerosis ofaoa", 'role': 'assistant'}]