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
Anterior cruciate ligament prevents : 
Select and explain. 
A. Anterior dislocation of tibia, B. Posterior dislocation of tibia, C. Anterior dislocation of femur, D. Posterior dislocation of femur
A: Anterior dislocation of tibia
Answer: A: Anterior dislocation of tibia 
Explanation: A i.e. Anterior dislocation of tibia