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': 'Blue vire technology is used in \nSelect and explain. \nA. VorTEX, B. VorTEX Blue, C. D3XF, D. Twisted Blue', 'role': 'user'}, {'content': 'Answer: B \nExplanation: VorTEX uses M wire NiTi', 'role': 'assistant'}]