Elbow joint is an example of

Correct Answer - B
In hinge joint, the convex surface of one bone fitsn into the concave surface of another bone, e.g. knee elbow and interphalangeal joints.
Pivot joint, one bone is fixed and second articulated, e.g. atlas and axial of skull rotate with aixs vertebra.
Gliding joints primarily permit side-by-side and back-and-forth gliding movements, e.g. intercarpal joints and interarsal joints.
In ball and socket joint ball of one bone articulates in socket of another bone, e.g. head of humerus and glenoid cavity of pectoral girdle.