This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'All are indications for surgery in ulcerative colitis except \nSelect and explain. \nA. Dysplasia, carcinoma, B. Massive colonic bleeding, C. Toxic megacolon, D. Primary sclerosing cholangitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Colectomy has no effect on the course of primary sclerosing cholangitis. Indications for the surgical management of ulcerative colitis include fulminant colitis with toxic megacolon, massive bleeding, intractable disease, and dysplasia or carcinoma. Malnutrition and growth retardation may necessitate resection in pediatric and adolescent patients.Ref: Sabiston 20e pg: 1344', 'role': 'assistant'}]