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': 'Provision of integrated preventive, curative and promotional health services are part of \nSelect and explain. \nA. Comprehensive health care system, B. Primary healthcare system, C. Universal healthcare, D. Basic health care', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]