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': 'All of the following involve a two-way communication except \nSelect and explain. \nA. Symposium, B. Lecture, C. Panel discussion, D. Workshop', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In network analysis\n\nShortest (minimum) time or path → PERT\nLongest time or path → Critical path method', 'role': 'assistant'}]