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
[{'content': "Deforming Polyarthritis is associated with all of the following except - \nSelect and explain. \nA. Rheumatoid arthritis, B. Psoriatic arthritis, C. Behcet's syndrome, D. Ankylosing spondylitis", 'role': 'user'}, {'content': "Answer: C \nExplanation: The arthritis of Bechet's syndrome is not deforming and affects knees and ankles.\nRheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, neuropathic arthropathy etc. cause deforming arthritis.", 'role': 'assistant'}]