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': 'Fluoride content is more in which milk product? \nSelect and explain. \nA. Cheese, B. Butter, C. Toned milk, D. Butter milk', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]