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
Shape memory is seen in: 
Select and explain. 
A. Stainless steel wire, B. NITINOL wire, C. TMA wire, D. Aluminium
B: NITINOL wire
Answer: B: NITINOL wire 
Explanation: None