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: Unknown
[{'content': 'Which of the following is the auto antibody associated with Rheumatoid arthritis - \nSelect and explain. \nA. Anti DLE, B. Anti CCP, C. Antids DNA, D. Antihistone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anti CCP', 'role': 'assistant'}]