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 safe dose is \nSelect and explain. \nA. 8-16 mg F/kg body weight, B. 16-32 mg F/kg body weight, C. 30-64 mg F/kg body weight, D. 12-30 mg F/kg body weight', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]