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: Orthopaedics
[{'content': 'About posterior cruciate ligament, true statement is - \nSelect and explain. \nA. Prevent posterior displacement of Tibia, B. Attaches to lateral femoral condyle, C. Intra synovial, D. Inserted on medial side of medial femoral condyle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: PCL prevents posterior gliding (subluxation) of tibia over femur.\n\nACL attachments \n\nOrigin (anterior) : - From anterior part of intercondylar area of tibia just behind the anterior horn of medial meniscus.\nInsertion (posterior) : - On posterior part of medial surface of lateral femoral condyle.\n\nPCL attachments\n\nOrigin (posterior) : - From posterior part of intercondylar area of tibia.\nInsertion (anterior) : - On anterior part of lateral surface of medial femoral condyle.', 'role': 'assistant'}]