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': 'Calcium hydroxide is the chief ingredient in many cavity liners and bases because of all of the following characteristics; except: \nSelect and explain. \nA. Elevated pH, B. Stimulator of secondary dentin formation, C. Antimicrobial, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Calcium\xa0hydroxide is the chief ingredient in many cavity-liners and cement-base materials because calcium hydroxide is antimicrobial, has an elevated pH (basic,\xa0 alkaline),\xa0 and stimulates the formation of secondary dentin over an injured pulp to protect it over the long term.', 'role': 'assistant'}]