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
Onion skin spleen is seen in 
Select and explain. 
A. SLE, B. Sjogren's syndrome, C. Thrombotic thrombocytopenic purpura, D. Henoch shonlein purpura
A: SLE
Answer: A: SLE 
Explanation: Onion skin patten is due to Concentric Fibrosis seen in SLE.