Which joint is spared in Rheumatoid arthritis: (A) MP joints of hand., (B) DIP joints of finger, (C) PIP joints of finger, (D) Atlanto-axial joint
Answer is B. Ans. is 'b' i.e. DIP joints of finger. DIP joint is characteristically spared in RA.Joint most commonly involved in RA Metacarpophalangeal joints especially of index finger.