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प्रश्न
Which of the following is not a fossil source of energy?
(a) kerosene oil
(b) cow-dung cakes
(c) CNG
(d) coal
उत्तर
Cow-dung cakes
Fossil fuels take thousands of years to form deep under the earth. Cow dung does not come under this category of fuels.
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संबंधित प्रश्न
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