Rotation does not occur at which of the following joints?

The knee joint primarily functions as a hinge joint, which allows flexion and extension of the leg in a forward and backward motion. While the knee does have some degree of rotational movement, particularly when flexed, it is not primarily known for rotation. The articulation at the knee is mainly focused on the movement of bending and straightening the leg without significant rotational capability.

In contrast, the pelvis, elbow, and spine all allow for some degree of rotational movement. The pelvis can rotate to facilitate movements in the lower body, the elbow allows for pronation and supination of the forearm, and the spine facilitates rotation through its intervertebral joints, contributing significantly to overall torso movement. Each of these joints specializes in rotation, making the knee distinctly different in its primary movement capabilities.