White coal is A. Uranium B. Hydro-electricity C. Diamond D. None of these

The correct answer is B. Hydro-electricity.

White coal is a term used to describe hydroelectricity, a form of renewable energy that uses the power of moving water to generate electricity. Hydroelectricity is a clean and efficient source of energy that does not produce greenhouse gases. It is also a reliable source of energy, as the water cycle is constantly replenished.

Uranium is a radioactive metal that is used to generate nuclear power. Nuclear power is a non-renewable energy source that produces greenhouse gases.

Diamond is a hard, transparent mineral that is made of carbon. Diamonds are not a source of energy.

None of these is a correct answer.