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: Medicine
Erosion of joint is seen in all except 
Select and explain. 
A. SLE, B. Osteoarthritis, C. Psoriatic arthropathy, D. Rheumatoid arthritis
A: SLE
Answer: A: SLE 
Explanation: None