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
Treatment of choice in intractable ulcerative colitis ; 
Select and explain. 
A. Mucosal proctectomy - Ileoanal pouch anastomosis, B. Proctectomy, C. Colectomy with ileostomy, D. Ileorectal anastomosis
A: Mucosal proctectomy - Ileoanal pouch anastomosis
Answer: A: Mucosal proctectomy - Ileoanal pouch anastomosis 
Explanation: Indications for surgery in ulcerative colitis Intractable disease Fulminant disease Toxic megacolon Colonic perforation Massive colonic hemorrhage Extracolonic disease Colonic obstruction Colon cancer prophylaxis Colon dysplasia or cancer