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: Orthopaedics
False about Popliteal entrapment syndrome 
Select and explain. 
A. Mainly due to atherosclerosis, B. Exercise induced calf claudication, C. Decreased ankle pulse on ankle flexion, D. Abnormal relation between medial head of gastrocnemius and popliteal artery
A: Mainly due to atherosclerosis
Answer: A: Mainly due to atherosclerosis 
Explanation: Popliteal entrapment syndrome

Due to congenital adnormality between popliteal artery and medial head gastrocnemius.
Treated with release of muscular origin of medial head of gastrocnemius.