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: Unknown
Not true about anterior cruciate ligament - 
Select and explain. 
A. It begins just behind the anterior horn of lateral meniscus on tibia, B. It is taut in extension, C. It provides proprioceptive inputs to knee, D. It is extrasynovial
A: It begins just behind the anterior horn of lateral meniscus on tibia
Answer: A: It begins just behind the anterior horn of lateral meniscus on tibia 
Explanation: Ans. is 'a' i.e., It begins just behind the anterior horn of lateral meniscus on tibia Anterior cruciate ligament (ACL)* ACL is one of the most important ligament of the knee joint.* ACL begins from anterior part of intercondylar area of tibia just behind the anterior horn of medial meniscus and runs upwards, backwards & laterally to attach the posterior part of medial surface of lateral condyle of femur.* Both Cruciate Ligaments are Intra articular, intra capsular and extrasynovial. * ACL provides antero-posterior stability and prevents anterior gliding of tibia on femur and prevents hyperextension.* ACL also provides proprioceptive function of knee joint.* ACL is taut during extension.