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
[{'content': 'Internal fistulas with colonic diveiculitis are most often - \nSelect and explain. \nA. Colovesical, B. Coloenteric, C. Colocolonic, D. Colovaginal', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Colovesical", 'role': 'assistant'}]