A) oxides of sulphur and nitrogen
B) \[{{O}_{2}}\]and \[{{N}_{2}}\]
C) \[{{O}_{2}}\]and \[{{O}_{3}}\]
D) \[{{O}_{3}}\] and \[{{N}_{3}}\]
Correct Answer: A
Solution :
Smog is caused by oxides of sulphur and nitrogen.
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