<prompt> Ostearthritis commonly involves -a Proximal IP jointb Distal IP jointc Ist carpometacarpal jointd Wrist jointe Distal radio - ulnar jointabcbcacdbcd  <response>: Joint involvement in OACommon joints : Knee, Hip, Spine cervical, lumbosacral, Hand PIP, DIP, first carpometacarpal, first tarso-metatarsal.Uncommon joint : ShoulderSpared : Wrist, elbow, ankle, metacarpophalangeal. 