<prompt> Proximal interphalangeal, distal interphalangeal 1st carpometacarpal joint involvement and sparing of wrist is a feature of:Rheumatoid ahritisPseudogoutPsoriatic ahropathyOsteoahritis  <response>: Answer is D Osteoahritis :Sparing of wrist and metacarpophalangeal joint with involvement of base of thumb i.e. carpometacarpal joint is very characteristic of osteoahritis.Both DIP Herbedens nodes and PIP Bouchards nodes are involved in osteoahritis.QDIP is the most common form of idiopathic O.A. 