Most hazardous metal pollutant of automobile exhaust is:
Correct answer: C. Pb
- A. Hg
- B. Cd
- C. Pb
- D. Cu
Explanation
Lead is the characteristic hazardous metal in automobile exhaust, especially from vehicles using leaded petrol, and it affects the nervous system and blood formation. Mercury and cadmium are also toxic but are not the principal metal pollutant traditionally associated with automobile exhaust.
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