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': 'Fracture of body of mandible with full arch of teeth (undisplaced) is treated by: \nSelect and explain. \nA. IMF, B. Open reduction and internal fixation, C. Close reduction and internal fixation, D. External pin fixation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]