The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Most specific for diagnosing Ankylosing spondyliti?   (A) HLA B27   (B) B/l sactoilitis   (C) Lumbar movement   (D) ESR
['(B) B/l sactoilitis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) HLA B27 \n (B) B/l sactoilitis \n (C) Lumbar movement \n (D) ESR <> possible answers', '  Most specific for diagnosing Ankylosing spondyliti? <> context@']