This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Which is true of ulcerative colitis: 
Select and explain. 
A. String sign of Kantor positive, B. Skip lesions are seen, C. Rectum is always involved, D. Fistulas are common
C: Rectum is always involved
Answer: C: Rectum is always involved 
Explanation: Ans. (c) Rectum is always involved* In ulcerative colitis rectum is always involved.* In ulcerative colitis least involved area: Anus