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': 'Health education charts serially flashed to the groups while talking are known as? \nSelect and explain. \nA. Flannel graph, B. Flip charts, C. Flash cards, D. Exhibition charts', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is self-explanatory.', 'role': 'assistant'}]