<prompt> Deforming Polyarthritis is associated with all of the following except -Rheumatoid arthritisPsoriatic arthritisBehcets syndromeAnkylosing spondylitis  <response>: The arthritis of Bechets syndrome is not deforming and affects knees and ankles.Rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, neuropathic arthropathy etc. cause deforming arthritis. 