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': 'Anderson and Hillman in 1971 introduced this into orthodontics? \nSelect and explain. \nA. β NiTi, B. NiTinol, C. Chinese NiTi, D. Sentalloy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]