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': 'Certainly Lethal Dose of fluoride in case of children: \nSelect and explain. \nA. 1-1.5 grms, B. 1.5-2.5 grms, C. 2.5-5 grms, D. 5-10 grms', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The Certainly Lethal Dose(CLD) of fluorides is 32-64 mg per kg of body weight i.e, approximately 2.5-5 gms of fluoride in cases of children and 5-10 gms, one single related dose, in case of adults.', 'role': 'assistant'}]