Question

Which of the following statements is/are correct? 1.Photochemical smog is formed by the reaction of nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the absence of sunlight. 2.Ground level ozone is the primary constituent of the smog. Select the correct answer using the code given below:

A 1 only
B 2 only
C Both are correct
D None of the above
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