A chemical weed in troposphere and protectant in stratosphere is

A chemical weed in troposphere but a protector in stratosphere is

The stratosphere :

Troposphere pollutant contains.

Troposphere pollutant contains

Which of the following statements above about ozone are not true? a) Ozone is formed in the stratosphere. b) Ozone is good in the troposphere and bad in the stratosphere. c) Ozone depletion is maximum near poles.

Assertion: Excess of ozone in troposphere called bad ozone while excess in stratosphere is known as "good" ozone. Reason: In troposphere ozone acts as pollutant while in stratosphere it protects from U.V. radiations.