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
Posterior cruciate ligament prevents the following action of the tibia on femur? 
Select and explain. 
A. Anterior dislocation, B. Posterior dislocation, C. Rotation, D. Limit hyperflexion
B: Posterior dislocation
Answer: B: Posterior dislocation 
Explanation: Functions of posterior cruciate ligament:Stabilises kneePrevents posterior dislocation of the tibia on femurLimits hyper extension of knee only if the anterior cruciate is rupturedFunction of ACL: Prevents anterior dislocation of the tibia on femur Ref: BDC, 4th Volume, 2/145