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': 'Which is not true about high copper amalgam alloys: \nSelect and explain. \nA. Low tensile and compressive strength, B. Low Hg: Alloy ratio, C. High tensile strength, D. Low creep', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]