Which of the following emissions in the exhaust gas of an I.C. engine – McqOptions

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1.	Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?
A.	Nitrogen oxides
B.	Hydrocarbons
C.	both 'a' & 'b'
D.	Carbon monoxide
Answer» D. Carbon monoxide

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