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': 'Secondary caries is least likely seen with: \nSelect and explain. \nA. Silicate cement, B. Zinc phosphate, C. Polycarboxylate, D. GIC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]