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
[{'content': 'High fiber diet reduces risk of the following except: \nSelect and explain. \nA. IBD, B. Ca Colon, C. Sigmoid volvulus, D. Diverticulitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Sigmoid volvulusRef: Sahiston Textbook of Surgery, 20th edition, Pages 1330, 1334 & 1339* Sigmoid volvulus accounts for two-thirds of all cases of colonic volvulus.* Factors associated with sigmoid volvulus:# Constipation# Old age (7th-8th decade)# Psychiatric patients# High fiber diet intake countries* High fiber diet is protective in:# Cancer colon# Ulcerative colitis# Diverticulitis', 'role': 'assistant'}]