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': 'Which cement base has the highest modulus of elasticity? \nSelect and explain. \nA. Zinc polycarboxylate, B. Polymer reinforced ZOE cement, C. Zinc phosphate, D. Glass inomer cement', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]