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: Pathology
All of the following are precancerous conditions except: 
Select and explain. 
A. SLE, B. Peutz-Jeghers syndrome, C. Plummer-Vinson syndrome, D. Xeroderma pigmentosum
A: SLE
Answer: A: SLE 
Explanation: None