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 of the following do polycarboxylate and GIC have in common? \nSelect and explain. \nA. Polysiloxane, B. Phosphoric acid, C. Polyacrylic acid, D. Ion leachable glass', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]