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: Social & Preventive Medicine
[{'content': 'Principle of health education includes \nSelect and explain. \nA. Interest, B. Know to unknown, C. Good human relations, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Principle of health education :\n\nInterst.\nCredibility.\nParticipation.\nMotivation.\nReinforcement.\nLearning by doing.\nComprehension.\nKnown to unknown.\nSetting an example.\nGood human relations.\nFeedback.\nLeaders.', 'role': 'assistant'}]