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
[{'content': 'Brinell hardness number of a dental gold alloy is directly proportional to its : \nSelect and explain. \nA. Tensile strength, B. Elongation, C. Modulus of elasticity, D. Modulus of resilience', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The Brinell hardness number is related to\xa0the 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.\nKey Concept: The Brinell hardness number is related to\xa0the proportional limit and the ultimate tensile strength of dental gold alloys.\nPhillips dental materials 12th edition page no 64', 'role': 'assistant'}]