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
An appendicular fistula is least likely to heal if ? 
Select and explain. 
A. The stump was sutured with vicryl, B. There is stenosis/narrowing of the sigmoid colon, C. Superadded infection, D. None
B: There is stenosis/narrowing of the sigmoid colon
Answer: B: There is stenosis/narrowing of the sigmoid colon 
Explanation: Ans. is 'b' i.e., There is stenosis/narrowing of the sigmoid colon