Consider the following statements
1. Montreal Protocol was signed in 1987 for Ozone layer depletion protection.
2.World Ozone day is celebrated on 22nd March.
3.Ozone is a Greenhouse gas responsible for Global Warming.
Which of the statements given above is/are correct?
1. Only 1 and 2
2. Only 1 and 3
3. Only 2 and 3
4. All of above