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Commercial sources of energy purely consist of

1)power, coal, oil, gas, hydro-electricity and uranium

2)coal, oil, firewood, vegetable waste and agricultural waste

3)power, coal, animal dung and firewood

4)coal, gas, oil and firewood


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    power, coal, oil, gas, hydro-electricity and uranium

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  • Exam: BPSC Combined (Pre) 2011





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