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: Dental
[{'content': 'According to Ellis classification, the type of fracture is: \nSelect and explain. \nA. Type II, B. Type III, C. Type IV, D. Type IX', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]