This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'HLA Associated with Rheumatoid ahritis is? \nSelect and explain. \nA. HLAB27, B. HLA-DR4, C. HLA CW6, D. HLAB8', 'role': 'user'}, {'content': 'Answer: B \nExplanation: harshmohan textbook of pathology 7th edition. *RA has high association with HLA DR4 ,HLA DR1 and famalian aggregation.', 'role': 'assistant'}]