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': 'Lefort-II fracture involves all of the following bones, except: \nSelect and explain. \nA. Maxilla, B. Nasal, C. Ethmoidal bone, D. Lacrimal bone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Guerin fracture is other name for Le Fort I or low level fracture.\nLe Fort II involves maxilla, nasal, lacrimal bones.\nLe Fort III involves maxilla, lacrimal, nasal and ethmoidal bones.', 'role': 'assistant'}]