Which of the following represents a structural classification for joints that are separated by a joint cavity?

A. cartilaginous
B. synovial
C. diarthrosis
D. fibrous

Synovial joint.

Explanation:

The region where two bones join are called joints.The joints found in our body are, cartilaginous joint, fibrous joint, synovial joint, ball and socket joint etc.The characteristic feature of synovial joint is the presence of a bone cavity into which other bone fit.However, in this type of joint, the bones do not contact each otherThe cavity is filled with synovial fluid which provides lubrication to the bones and act as shock absorber.The best known example of synovial joint is the knee joint.