The comparative form of the above sentence is : (A) Solar energy is cheaper than any other form of energy.
Solar energy is one of the cheapest forms of energy.
The comparative form of the above sentence is :
(A) Solar energy is cheaper than any other form of energy.
(B) No other form of energy is as cheap as solar energy.
(C) Solar energy is cheaper than most other forms of energy.
(D) Very few forms of energy are as cheap as solar energy.
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