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
Which of the following wires are also called shape memory wires: 
Select and explain. 
A. Stainless steel round wire, B. Multiflex round wire, C. Nickel titanium wires, D. Stainless steel edgewise wire
C: Nickel titanium wires
Answer: C: Nickel titanium wires 
Explanation: None