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 diverticulitis are most often \nSelect and explain. \nA. Colovesical, B. Coloenteric, C. Colocolonic, D. Colovaginal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]