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
Safe disposal of mercury is – 
Select and explain. 
A. Collect carefully and recycle, B. Controlled combustion, C. Treatment with chemicals, D. Deep burial
A: Collect carefully and recycle
Answer: A: Collect carefully and recycle 
Explanation: All mercury and mercury-containing items should be recycled.
It should never be poured down a drain or sewer, flushed down a toilet, or thrown in the thrash.
As long as mercury is recycled, it will stay in the recycling loop, going into new products rather than into the environment.