This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
Joint not involved in osteoahritis 
Select and explain. 
A. PIP, B. DIP, C. MCP, D. Knee
C: MCP
Answer: C: MCP 
Explanation: Joint involvement in OACommon joints: Knee, Hip, spine (cervical, lumbosacral), Hand (PIP, DIP, first carpometacarpal), first tarsometatarsalUncommon joint: shoulderSpared: Wrist, elbow, ankle, metacarpophalangeal(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 88, 101, 127)