Which of the following metals acts as a pollutant?
Correct answer: D. All of the above
- A. Hg (Mercury)
- B. Pb (Lead)
- C. Cd(Cadmium)
- D. All of the above
Explanation
Mercury, lead, and cadmium are all heavy metals that are toxic to living organisms even at low concentrations. They are persistent environmental pollutants that can be released from various industrial activities.
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