<prompt> Supination and pronation of upper limb is due to:Wrist jointRadio-ulnar jointElbow jointCarpometacarpal joint  <response>: Ans. b Radio-ulnar jointRef.: BDC 6th ed. vol. I 153-154; Clinically Oriented Anatomy by Keith, Moore, 5th ed 865 During Supination radius rotates laterally and palm laces anteriorly During pronation, radius rotates medially and palm faces posteriorly This movement takes place around distal radio-ulnar joint. 