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
Ability of an orthodontic wire to spring back to its original shape is evaluated by: 
Select and explain. 
A. Brittleness, B. Resilience, C. Tensile strength, D. Toughness
B: Resilience
Answer: B: Resilience 
Explanation: Popularly, the term resilience is associated with springiness, but it means precisely the amount of energy absorbed within a unit volume of a structure when it is stressed to its proportional limit. The resilience of two or more materials can be compared by observing the areas under the elastic region of their stress-strain plots assuming that they are plotted on the same scale. The material with  the larger elastic area has the higher resilience.
Phillips dental materials 12th edition page no 55