Photochemical smog is formed from automobile exhaust Options: A . &nbspBy reaction of hydrocarbon & nitric oxide in presence of sunlight B . &nbspAppears only on sunny days C . &nbspIs harmful for crops and trees also besides causing eye irritation & asthma D . &nbspAll of the above

Photochemical smog is formed from automobile exhaust

Question

Photochemical smog is formed from automobile exhaust

Options:

A . By reaction of hydrocarbon & nitric oxide in presence of sunlight

B . Appears only on sunny days

C . Is harmful for crops and trees also besides causing eye irritation & asthma

D . All of the above

Answer: Option D

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