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': 'Active GP consists of \nSelect and explain. \nA. GP with calcium hydroxide, B. GP with ZOE, C. GP with glass ionomer, D. GP with zinc phosphate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]