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': 'A tooth which is impacted mesioangularly, in class2, position C has a difficulty index of: \nSelect and explain. \nA. 2, B. 8, C. 5, D. 6', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]