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 characterizes the silicate cement: \nSelect and explain. \nA. It is pulpal irritant, B. It is highly cariogenic, C. Chemically attaches to the tooth structure, D. It produces thinnest film surface', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]