GENERAL KNOWLEDGE

Detailed explanation-1: -Uranium is the most widely used fuel by nuclear power plants for nuclear fission. Nuclear power plants use a certain type of uranium-U-235-as fuel because its atoms are easily split apart. Although uranium is about 100 times more common than silver, U-235 is relatively rare at just over 0.7% of natural uranium.

Detailed explanation-2: -Most commercial reactor fuel uses low enriched uranium (LEU) enriched to between 3 percent and 5 percent 235U. Uranium between 3 and 5 percent 235U is sometimes referred to as “reactor-grade uranium.”

Detailed explanation-3: -Nuclear fuel-uranium Uranium is the fuel most widely used by nuclear plants for nuclear fission. Uranium is considered a nonrenewable energy source, even though it is a common metal found in rocks worldwide.

Detailed explanation-4: -For option (B)-Uranium is radioactive in nature. It is used in nuclear power plants where the process of nuclear fission is used to break Uranium into lighter elements and energy is released in the process. However it is not used as fuel in thermal power plants.