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': 'Advantage of titanium over other base metal alloys \nSelect and explain. \nA. Low weight, B. Low cost, C. Low strength, D. Low melting point', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]