Answer:
(c) The smog which is formed in
presence of sunlight is called photochemical smog. This occurs in the months of
summer when \[N{{O}_{3}}\] and hydrocarbons are present in large amounts in
atmosphere. Concentration of\[{{O}_{3}}\], PAN and aldehydes and ketones builds
up in the atmosphere. \[S{{O}_{2}}\]is not responsible for photochemical smog.
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