This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune Diseases, Subject name: Pathology
[{'content': 'HLA-B27 is associated with - \nSelect and explain. \nA. Ankylosing spondylitis, B. Rheumatoid arthritis, C. Chronic active hepatitis, D. Diabetes', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ankylosing spondylitis o HLA-B27is associated with seronegativespondyloartropathies (ankylosingspondylitis. Psoriatic arthritis, Reiter's syndrome, reactive arthritis) and acute anterior uveitis", 'role': 'assistant'}]