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': 'There is greater potential for thermal sensitivity to: \nSelect and explain. \nA. Gold castings, B. Amalgam restorations, C. Composite restorations, D. Silicate restorations', 'role': 'user'}, {'content': 'Answer: A \nExplanation: because of its higher thermal conductivity, teeth with gold\xa0Castings have a greater potential for thermal sensitivity than\xa0do those with amalgam restorations.', 'role': 'assistant'}]