A 18 yrs old boy was playing football,when he suddenly twisted his knee on the ankle and he fell down.He got up after 10 minutes and again started playing,but next day his knee was swollen and he could not move it.The most probable cause is:

• A. Medial meniscus tear
• B. Anterior cruciate ligament tear
• C. Medial collateral ligament injury
• D. Posterior cruciate ligament injury