This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arthritis, Subject name: Orthopaedics
Osteoarthritis does not affect: 
Select and explain. 
A. Knee joint, B. Hip joint, C. Interphalangial joint, D. Metacarpophalangial joint
D: Metacarpophalangial joint
Answer: D: Metacarpophalangial joint 
Explanation: Ans: d (Metacarpophalangeal joint)Ref: Maheshwari Ortho, 3rd ed, p. 252 & Harrison, 15thed, p. 1990