Articular cartilage found at the ends of the long bones serves to articular cartilage found at the ends of the long bones serves to attach tendons produce red blood cells (hemopoiesis) provide a smooth surface at the ends of synovial joints form the synovial membrane.

The correct answer will be- to provide smooth surface at the ends of synovial joint.

Explanation:

Articular cartilage is the white smooth tissue present at the end of the bones which covers the bones at the joints. The articular cartilage is devoid of the nerves, blood vessels and lymphatics but is exposed to the biochemical environment.

The cartilage at the joint helps in the movement of the bones by reducing the friction produced by gliding or sliding of the bones over each other.

Thus, to provide a smooth surface at the ends of synovial joint is the correct answer.