This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Water, Subject name: Social & Preventive Medicine
[{'content': 'Fluoride helps in - \nSelect and explain. \nA. Vision, B. Dentition, C. Myelination, D. Joint stability', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e.. Dentition o Fluoride helps in dentition and reduces tooth decay,o Flourine is often called a two edged sword i -i) Excess intake -Causes Endemic fluorosisii) Inadequate-Causes dental caries", 'role': 'assistant'}]