The correct answer is option A
#EXPLANATION:
A. In gliding joints, the articulating bones can slide upon one another.
B. Cartilaginous joints are slightly movable joints. In these joints, there is a pad of fibrocartilage between two adjoining bones which allows very slight movements.
C. Pivot joint is a rotatory joint. Here, one bone is fixed and bears a peg-like projection of pivot. The other bone fits over the pivot by a concavity and freely rotates around.
D. Hinge joint, a protuberance known as condyle at the end of one bone fits into the corresponding depression of the other. So, the joint allows movement in one place only.