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': 'Varnish is used under which cement? \nSelect and explain. \nA. Amalgam, B. ZOE cement, C. Zinc Phosphate Cement, D. Glass Ionomer cement', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]