This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
Lariche syndrome is due to? 
Select and explain. 
A. Bilateral iliac aery occlusion with sterility, B. Bilateral iliac aery occlusion with impotency, C. Unilateral iliac aery occlusion with sterility, D. Unilateral iliac aery occlusion with impotency
B: Bilateral iliac aery occlusion with impotency
Answer: B: Bilateral iliac aery occlusion with impotency 
Explanation: . Due to block in the common iliac aery or aooiliac segment or bilateral iliac aery may cause pain in the buttocks often associated with impotence is called Leriche's syndrome.pain commonly develops when the muscles are exercising.cause of pain is accumulation of substance p and metabolites. Refer page no 170 of SRB's manual of surgery 5 th edition.