This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Rheumatic Diseases, Subject name: Orthopaedics
[{'content': 'Joint erosion not a feature in - \nSelect and explain. \nA. SLE, B. Gout, C. Rheumatoid arthritis, D. Psoriasis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., SLE o Most people with SLE have intermittent polyarthritis, varying from mild to disabling, characterized by soft tissue swelling and tenderness in joints, most commonly in hands, wrists, and knees,o Joint deformities (hands and feet) develop in only 10% of patients.o Erosions on joint x-rays are rare; their presence suggests a non-lupus inflammatory arthropathy such as rheumatoid arthritis.", 'role': 'assistant'}]