UPPCS · প্রশ্ন 89

With reference to 'ozone layer', which of the following statements is/are correct? 1. Ozone layer shields the surface of the earth from the ultra-violet radiations from the sun. 2. Ozone depletion has been linked to the chlorofluorocarbons. Select the correct answer using the code given below.

1. ANeither 1 nor 2
2. BOnly 1
3. COnly 2
4. DBoth 1 and 2