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

Answer: Option A

Solution(By Examveda Team)

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.