This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Joint not involved in RA ? 
Select and explain. 
A. PIP, B. DIP, C. Wrist, D. MCP
B: DIP
Answer: B: DIP 
Explanation: Ans. is 'b' i.e., DIP Joint Distal interphalangeal joint Proximal interphalangeal joint Metacarpophalangeal joint 1st Carpometacarpal joint Wrist Spared jointWrist and MTPDIP Impoant ahritis involving the joint Osteoahritis, Psoriatic ahritis, Reactive ahritis Osteoahritis, RA, SLE, Psoriatic ahritis RA, pseudogout, hemochromatosis Osteoahritis RA, Pseudogout, gonococcal ahritis, juvenile ahritis Osteoahritis RA