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': 'Guerin fracture is: \nSelect and explain. \nA. Maxillary fracture, B. Maxillary and zygomatic fracture, C. Maxillary and nasal bone fracture, D. Nasal bone fracture only', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]