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': 'Vitremer is? \nSelect and explain. \nA. Resin modified GIC, B. Metal modified GIC, C. Organically modified composite, D. Polyacid modified composite', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]