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': 'Not true about Ankylosing spondylitis \nSelect and explain. \nA. HLA B-27 positive, B. Sacroiliitis, C. Uveitis, D. Epidermolysis Bullosa', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]