Which set of the following gases is most important for greenhouse effect?

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(c) Carbon dioxide, Methane, Nitrous oxide, Water vapour. — Joseph Fourier, a French mathematician was first to describe the greenhouse effect, responsible for global warming. The greenhouse effect is a natural process that warms the earth’s surface. When the sun’s energy reaches the earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re- radiated by greenhouse gases. The absorbed energy warms the atmosphere and the surface of the earth. Human activities are changing earth's natural greenhouse effect. Burning fossil fuels like coal and oil puts more carbon dioxide into our atmosphere which results to global warming. Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs).

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(A) Carbon dioxide, Methane, Chlorine, Nitric oxide.

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(B) Nitric oxide, Methane, Ethane, Chlorfluoro carbons.

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(D) Carbon Monoxide, Sulphur dioxide, Methane, Water vapour

Which set of the following gases is most important for greenhouse effect?

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