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: Surgery
All of the following are pre-malignant except: 
Select and explain. 
A. Crohn's disease, B. Ulcerative colitis, C. Peutz-Jegher's syndrome, D. Barrett's esophagus
C: Peutz-Jegher's syndrome
Answer: C: Peutz-Jegher's syndrome 
Explanation: Ans. c. Peutz-Jegher's syndrome