Arounded knob that articulates with another bone is called a

A rounded knob that articulates with another bone is called a condyle. The condyle is the round prominence at the end of a bone and part of an articulation with another bone. This articulation is called joint.  On the femur, in the knee joint the condyle is referred to as Medial condyle and Lateral condyle. On the tibia, in the knee joint is referred to as Medial condyle ·

C) they are specialized meaning they are designed to do different things