Which of the following statements is correct ?

Options

A. Primary pollutants are more harmful than secondary pollutants.
B. Primary pollutants ans secondary pollutants are equally harmful.
C. Secondary pollutants are more harmful than primary pollutants.
D. DDT is a secondary pollutant.

Answer

C

Explanation

Primary pollutants persist in the form they are released in the environment. Secondary pollutants are formed by reaction amongst the primary pollutants. Secondary pollutant are more toxic than primary pollutants. DDT is aprimary pollutant.