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: Pathology
[{'content': 'To rule out rheumatoid ahriis, most impoant among the followings is - \nSelect and explain. \nA. HLA DR8, B. HLA DR4, C. HLA DQ1, D. HLA B27', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. HLA DR4DR4 is strongly associated with RA (also with Type 1 DM Pemphigus vulgaris).', 'role': 'assistant'}]