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
"Erosion of joint" is not a feature of . 
Select and explain. 
A. Psoriatic ahritis, B. Rheumatoid ahritis, C. Systemic lupus erythematosus, D. Reiters disease
C: Systemic lupus erythematosus
Answer: C: Systemic lupus erythematosus 
Explanation: Ref Semantischolar.org