Which of the following is not seronegative spondyloarthropathy?
Reiter's arthritis
Ankylosing spondylitis
Psorialic arthritis
Rheumatoid arthritis
Seronegative spondyloarthroparthies are group of disorders with involvement of sacroiliac joint and associated with HLA-B27.
Rheumatoid arthritis doesn't belong to this group.