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: Surgery
[{'content': 'The blood supply of Anterior Cruciate Ligament (ACL) is primarily derived from: \nSelect and explain. \nA. Superior medial genicular aery, B. Descending genicular aery, C. Middle genicular aery, D. Circumflex fibular aery', 'role': 'user'}, {'content': "Answer: C \nExplanation: The primary blood supply to the Anterior cruciate ligament comes from the middle genicular aery which pierces the posterior capsule and enters the intercondylar notch near the femoral attachment. Ref: Campbell's Operative Ohopaedics, 11th Edition, Page 2497;Operative Ahroscopy, 3rd Edition, Pages 67, 68; Current Concepts in ACL Reconstruction By Freddie Fu, 2008, Chapter 2, Page 28", 'role': 'assistant'}]