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
Brinell hardness number of a dental gold alloy is directly proportional to its : 
Select and explain. 
A. Tensile strength, B. Elongation, C. Modulus of elasticity, D. Modulus of resilience
A: Tensile strength
Answer: A: Tensile strength 
Explanation: The Brinell hardness number is related to the proportional limit and the ultimate tensile strength of dental gold alloys. Because the test is a relatively simple one, it may often be conveniently used as an index of properties that involve more complex test methods. The Brinell hardness test is one of the oldest tests employed for determining the hardness of metals.
Key Concept: The Brinell hardness number is related to the proportional limit and the ultimate tensile strength of dental gold alloys.
Phillips dental materials 12th edition page no 64