This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
[{'content': 'In which of the following ahritis erosion are not seen \nSelect and explain. \nA. Rheumatoid ahritis, B. Systemic lupus ehematosus, C. Psoriasis, D. Gout', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref Semantischolar.org', 'role': 'assistant'}]