This joint allow the greatest freedom of movement. The hips and shoulders have this type of joint, in which the round end of a long bone fits into the hollow of another bone.What is this joint called as?

Question

$\begin{array}{1 1} (a)\; \text{hinge joint} \\ (b)\; \text{pivot joint} \\ (c)\; \text{ball and socket joint} \\ (d)\; \text{fibrous} \end{array}$