Which of the following is not a ligament of the knee joint?

The lateral posterior ligament (LPL) is not a recognized ligament of the knee joint, making it the correct choice. The knee joint is stabilized by several key ligaments, each with specific roles in maintaining the joint's integrity and function. The anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL) are crucial for controlling the forward and backward movements of the tibia relative to the femur. Additionally, the medial collateral ligament (MCL) is vital for providing stability against valgus stress, helping to prevent the knee from buckling inward.

The term "lateral posterior ligament" does not correspond to any anatomical structure in the knee joint. Instead, it is likely a mislabeling or confusion with other structures that support the knee. Understanding the major ligaments associated with the knee, such as the ACL, PCL, and MCL, is essential for recognizing how these components work together to facilitate joint movement and stability.