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: Orthopaedics
Non-Inflammatory arthritis is 
Select and explain. 
A. Rheumatoid arthritis, B. Reiter's syndrome, C. Gonococcal arthritis, D. Osteo-arthritis
D: Osteo-arthritis
Answer: D: Osteo-arthritis 
Explanation: None