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-deforming arthritis among the following 
Select and explain. 
A. Syphilis, B. Bechet's sydrome, C. Osteoarthritis, D. Psoriatic arthritis
B: Bechet's sydrome
Answer: B: Bechet's sydrome 
Explanation: None