Consider the following statements related to ozone:1. Tropospheric ozone is harmful2. Stratospheric ozone is beneficial3. During prevalence smog, O3 is formedWhich of the above statements are correct?

• A. 1, 2 and 3
• B. 1 and 2 only
• C. 1 and 3 only
• D. 2 and 3 only