A
Posterolateral bundle of the PCL
B
Anterolateral bundle of the PCL
C
Popliteofibular ligament
D
Posterior oblique ligament
Explanation:The Posterior Cruciate Ligament (PCL) consists of two main bundles. The anterolateral (AL) bundle is thicker, stronger, and is the primary restraint to posterior tibial translation at 90 degrees of flexion. The posterolateral (PL) bundle is tight in extension. Reference: Harner et al., 'Biomechanical analysis of a double-bundle PCL reconstruction', Am J Sports Med (2000).