Incudomalleolar joint is a ?
Ellipsoid joint
Pivot joint
Hinge joint
Saddle joint
Synol joints are classified as follows :1) Plane synol joints (flat joints)2) Hinge joints (Ginglymus joints or ginglymi)3) Pivot or trochoid joints4) Condylar (bicondylar) joints5) Ellipsoid jointsNote : Metacarpophalangeal joints are ellipsoid joints functionally, but structurally they belong to condylar joints.6) Saddle (sellar) jointsThe aicular surfaces are reciprocally saddle shaped, i.e. concavo-convex. Examples are first (thumb) carpometacarpal joint, sternoclavicular joint, calcaneocuboid joint, incudomalleolar joint (smallest saddle joint) and patellofemoral joint.7) Ball and socket (spheroidal) joints