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
What is ultimate strength: 
Select and explain. 
A. Stress at the point of fracture., B. Total energy stored in the body at the point of fracture., C. Maximum stress beared by body before fracture., D. None of the above.
C: Maximum stress beared by body before fracture.
Answer: C: Maximum stress beared by body before fracture. 
Explanation: option A is fracture strength.
Option B is toughness