Commercial sources of energy purely consist of

A Power, coal, oil, gas, hydro-electricity and uranium
B Coal, oil, firewood, vegetable waste and agricultural waste
C Power, coal, animal dung and firewood
D Coal, gas, oil and firewood

Correct Answer: Power, coal, oil, gas, hydro-electricity and uranium

Commercial energy is energy which is available to the users at some price. Commercial sources of energy purely consist of power, coal, oil, gas, hydro-electricity and uranium.

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