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': '"Erosion of joint" is not a feature of . \nSelect and explain. \nA. Psoriatic ahritis, B. Rheumatoid ahritis, C. Systemic lupus erythematosus, D. Reiters disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Semantischolar.org', 'role': 'assistant'}]