Movements of supination and pronation occurs in all of the following joints except (AI 07)
a) Superior radio-ulnar joint
b) Middle radio-ulnar joint
c) Inferior radio-ulnar joint
d) Radio-carpal joint
Supination and pronation are rotatory movements of the forearm (and hand) around a vertical axis. The movements are permitted at the superior and inferior radio-ulnar joints. Supination is more powerful than pronation because it is an antigravity movement. Supination movements are responsible for all screwing movements of the hand, e.g. as in tightening nuts and bolts. Morphologically, pronation and supination were evolved for picking up food and taking it to the mouth.