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': 'Main objective of Oral Health Programme by year 2000 is: \nSelect and explain. \nA. Caries free mouth, B. No caries up to 12 yrs of age, C. DMF<3, up to 12 yrs of age, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In 1981, WHO and the FDI World Dental Federation jointly formulated goals for oral health to be achieved by the year 2000.', 'role': 'assistant'}]