This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thigh, Knee,Leg,Foot & Ankle injuries, Subject name: Anatomy
[{'content': 'All of the following are true about ACL. Except- \nSelect and explain. \nA. Prevents anterior motion of femur over tibia, B. Prevents anterior motion of tibia over femur, C. Also provide some secondary varus-valgus stability, D. Is taught in extension of knee', 'role': 'user'}, {'content': 'Answer: A \nExplanation: *ACL prevents anterior gliding of tibia over femur. * It is taut during extension and also provides secondary medio- lateral (valgus- Varus) stability. Ref: Spos medicine 4th/e p.83', 'role': 'assistant'}]