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': 'The simplest alloy is a \nSelect and explain. \nA. Solid solution, B. Eutectic alloy, C. Peritectic alloy, D. Ternary alloy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]