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Indian Economy - Understanding the basics of Indian economic system

Consider the following statements:

1.Sulfur Hexafluoride is used in electric equipment including circuit breakers.

2.HFCs do not contribute to ozone depletion directly, but they are potent greenhouse gases.

3.Perfluorocarbons have a Long Atmospheric Life but high Global Warming Potential.

Which of the statements given above is/are correct?

1 only

1 and 3 only

2 only

1, 2 and 3 only

Although total emissions are relatively small, PFCs are extremely potent GHGs, with 100-year global warming potential
Hydrofluorocarbons, many of which contain a CF3 group, are one of the major substitutes for the chlorofluorocarbons and halons that are being phased out because they contribute to stratospheric ozone depletion.
Sulfur hexafluoride is generally used in present high-voltage circuit breakers at rated voltage higher than 52 kV. Into the 1980s, the pressure necessary to blast the arc was generated mostly by gas heating using arc energy.