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: Ophthalmology
[{'content': 'All of the following has HLAB27 associated with uveitis except \nSelect and explain. \nA. Ankylosing spondylitis, B. Behcets syndrome, C. Reiters syndrome, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ankylosing spondylitis and Reiters syndrome:\n\nBoth involve young males who are positive for\xa0HLA-B27.\n\nBehcet's syndrome:\n\nThe disease typically affects the\xa0young men who are positive for HLA-B51.", 'role': 'assistant'}]