A

Ankit Singh • 5.81K Points
Tutor III Chemistry 

Q. Which of the following is not a natural source of air pollution ?

  • (A) Volcanic eruptions and lightening discharge
  • (B) Biological decay of vegetable matter
  • (C) Photochemical oxidation of organic number
  • (D) None of the above
Correct Answer - Option(D)

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