This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Rheumatic Diseases, Subject name: Orthopaedics
[{'content': 'Spondyloarthopathy which is seronegative are all except - \nSelect and explain. \nA. AS, B. Psoriasis, C. JRA, D. Reiter syndrome', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e.Seronegative spondyloarthropathieso The seronegative spondyloarthropathies are a group of disorders that share certain clinical features and genetic associations. The word seronegative referes to the absence of rheumatoid factor in this group of disorders. The seronegative spondyloarthropathies include -Ankylosing spondylitisReactive arthritis - Reiter syndrome and enteritis associated arthritisP soriatic arthritisArthritis associated with inflammatory* bowel disease, i.e. enteropathic arthritisFeatures of seronegative spondyloarthropathieso Onset usually before 40 yearso Absence of RA factoro HLA - B27 positiveo Presence of uveitiso ExamplesAnkylosing spondylitis, Reitter's syndrome, Psoriatic arthritis, Enteropathic arthritis. Reactive arthritis.", 'role': 'assistant'}]