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': 'Which of the following wires are also called shape memory wires: \nSelect and explain. \nA. Stainless steel round wire, B. Multiflex round wire, C. Nickel titanium wires, D. Stainless steel edgewise wire', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]