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': "All the following diseases are associated with HILA B-27 & Uveitis, except - \nSelect and explain. \nA. Bechcet's syndrome, B. Psoriasis, C. Ankylosing Spondylitis, D. Reiter's syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Features of seronegative spondyloarthropathies\n\nOnset usually before 40 years\nThe absence of RA factor\nHLA - B27 positive\nPresence of uveitis\nExamples Ankylosing spondylitis, Reitter’s syndrome, Psoriatic arthritis, Enteropathic arthritis, Reactive arthritis.', 'role': 'assistant'}]