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: Surgery
[{'content': "HLA B27 is seen associated with aEUR' \nSelect and explain. \nA. Rhematoid ahritis, B. Ankylosing spondylitis, C. Sjogren syndrome, D. Scieroderma", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ankylosing spondylitis HLA B27 is associated with: Ankylosing spondylitisQ Reiter's syndromeQ Reactive ahritis (yersinia, salmonella, shigella, Chlamydia) Psoriatic spondylitisQ", 'role': 'assistant'}]