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': 'Safe disposal of mercury is - \nSelect and explain. \nA. Collect carefully and recycle, B. Controlled combustion, C. Treatment with chemicals, D. Deep burial', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Collect carefully and recycle o All mercury and mercury-containing items should be recycled. o It should never be poured down a drain or sewer, flushed down a toilet, or thrown in the thrash. o As long as mercury is recycled, it will stay in the recycling loop, going into new products rather than into the environment.", 'role': 'assistant'}]