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: Anatomy
About posterior cruciate ligament - the true statement is ? 
Select and explain. 
A. Attached to the lateral femoral condyle, B. Intrasynol, C. Prevents posterior dislocation of tibia, D. Relaxed in full flexion
C: Prevents posterior dislocation of tibia
Answer: C: Prevents posterior dislocation of tibia 
Explanation: Posterior cruciate ligament prevents posterior dislocation of tibia. Posterior displacement is prevented by anterolateral bundle during knee flexion and by the posteromedial bundle during knee extension.