This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammatory Bowel Disease, Subject name: Medicine
All the following are true regarding Crohn's disease except? 
Select and explain. 
A. Fistula formation is seen, B. Recurrence common after surgery, C. Inflammation limited to mucosa, D. Skip lesions
C: Inflammation limited to mucosa
Answer: C: Inflammation limited to mucosa 
Explanation: In Crohn's disease, the inflammation can be in multiple patches or one large patch,and may involve any area through out the entire digestive tract, often affecting the last pa of the small intestine (terminal ileum).