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
False about ulcerative colitis 
Select and explain. 
A. Continuous inflammation, B. Leadpipe appearance, C. String sign is seen, D. Crypt abscesses are typical
C: String sign is seen
Answer: C: String sign is seen 
Explanation: String sign is seen in chron's disease.