This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
45-year-old policeman comes from duty with complain of pain in right leg. On examination, pulse in right popliteal fossa was absent and pain in right buttock, where as in left side it was normal. The block is at which level? 
Select and explain. 
A. Femoral, B. Iliac, C. Aooiliac, D. Popliteal
B: Iliac
Answer: B: Iliac 
Explanation: As the pulse is absent in right popliteal fossa and also there is impaired blood supply in right buttock and left side is normal, the block lies in the right sided iliac vessel. Image showing blood supply of pelvis and lower limb. If block is in femoral or popliteal vessels, there will be no pain in buttocks. If aooiliac vessels are blocked, both limbs will be affected