Which of the following statements about ozone is correct ? 1. Tropospheric ozone protects us from UV radiations. 2. Stratospheric ozone is 'bad'. 3. Tropospheric ozone is 'good' 4. Stratospheric ozone protects us from UV radiations.[NEET 2019 ]

 ANSWER:4. Stratospheric ozone protects us from UV radiations.