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': 'An example of a two-way discussion is: \nSelect and explain. \nA. A seminar, B. Role playing, C. Symposium, D. Group discussion', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Group discussion', 'role': 'assistant'}]