<prompt> Which of the following is not seronegative spondyloarthropathy?Reiters arthritisAnkylosing spondylitisPsorialic arthritisRheumatoid arthritis  <response>: Seronegative spondyloarthroparthies are group of disorders with involvement of sacroiliac joint and associated with HLA-B27.Rheumatoid arthritis doesnt belong to this group. 