Photochemical smog is formed from automobile exhaust ________________?

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 A., B. & C.

Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.

Discuss the answer or suggest a sourced correction
Thank you for contributing.
Your comment was submitted and will appear after editorial review.

Your email is used only for moderation and is never displayed. Spam, copied material and fabricated endorsements are rejected.