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': 'Which of the following is an approach in health education: \nSelect and explain. \nA. Regulatory approach, B. Service approach, C. Educational approach, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Approaches in Health Education:\n\nRegulatory approach\nService approach\nEducational approach\nPrimary Health Care approach', 'role': 'assistant'}]