question_answer

The smog is essentially caused by the presence of

A) \[{{O}_{2}}\]and\[{{O}_{3}}\]

B) \[{{O}_{2}}\]and\[{{N}_{2}}\]

C) oxides of sulphur and nitrogen

D) \[{{O}_{3}}\]and\[{{N}_{2}}\]

Correct Answer: C

Solution :

andare responsible for smog (environmental pollution).