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': 'In a cavity preparation in which the remaining thickness of dentin is more than 1.5mm, the ideal base is: \nSelect and explain. \nA. Ca(OH)2, B. Zinc Phosphate, C. Silicophosphate, D. Glass ionomer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]