Consider the following statements: Chloro-fluorocarbons, which are popularly known as ozone-depleting substances, are used in the manufacture of 1. soluble foams. 2. Used in manufacturing of tubeless tyres. 3. Used in cleaning certain electronic components 4. Used as a pressing agent in aerosol cans. Which of the above statement(s) is/are correct?

Consider the following statements: Chloro-fluorocarbons, which are pop

1.	Consider the following statements: Chloro-fluorocarbons, which are popularly known as ozone-depleting substances, are used in the manufacture of 1. soluble foams. 2. Used in manufacturing of tubeless tyres. 3. Used in cleaning certain electronic components 4. Used as a pressing agent in aerosol cans. Which of the above statement(s) is/are correct?
A.	1,2 and 3
B.	only 4
C.	1,3 and 4
D.	all these
Answer» D. all these