Which of the following is not a secondary air pollutant ? – McqOptions

MCQOPTIONS

1.	Which of the following is not a secondary air pollutant ?
A.	Ozone
B.	Photochemical smog
C.	Sulphur dioxide
D.	All (a), (b) & (c)
Answer» D. All (a), (b) & (c)

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