This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Immunodeficiency, Subject name: Pediatrics
[{'content': 'Joint erosions are typically absent in:` \nSelect and explain. \nA. Rheumatoid ahritis, B. Systemic lupus erythematosus, C. Psoriatic ahritis, D. Osteoahritis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ahritis seen in SLE is Non-erosive ahritis (without deformity).', 'role': 'assistant'}]