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': 'Discarded cytotoxic medicines should be disposed in: \nSelect and explain. \nA. Blue bag, B. Black bag, C. Red bag, D. Yellow bag', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Black bag', 'role': 'assistant'}]