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': 'Collection of health information, its use and its transmission to other levels of the system by non-professional health workers is \nSelect and explain. \nA. Sentinel surveillance, B. Lay reporting, C. Census, D. Survey', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]