Which of the following statements regarding ozone layer within the atmosphere is/are correct? 1. It absorbs most of the ultraviolet radiation found in the Sun's rays. 2. Chlorofluorocarbons are serious threat to the ozone layer. Select the correct answer using the code given below -

• A. 1 only
• B. 2 only
• C. Both 1 and 2
• D. Neither 1 nor 2