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
The treatment of choice in fistula in ano 
Select and explain. 
A. Anal dilatation, B. Fissurotomy, C. Fistulectomy, D. Fistulotomy
D: Fistulotomy
Answer: D: Fistulotomy 
Explanation: Ans. is 'd' i.e., Fistulotomy