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
Unequal pulse in upper & lower extremeties (i.e., radio-femoral delay) is/are seen in: 
Select and explain. 
A. Aoic dissection, B. Post-ductal coarctation of aoa, C. Supra-valvular Aoic stenosis, D. Sub-valvular Aoic stenosis
B: Post-ductal coarctation of aoa
Answer: B: Post-ductal coarctation of aoa 
Explanation: 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