Which one of the following is not a bio-mass energy source ?

Which one of the following is not a bio-mass energy source ?

Wood
Nuclear reactor
Gobar gas
Coal
This question was previously asked in
UPSC NDA-1 – 2021
Biomass energy sources are derived from organic matter, such as plants, animals, and their waste.
A) Wood is organic matter from trees and is a common biomass fuel.
C) Gobar gas (Biogas) is produced by the anaerobic decomposition of organic matter (like cow dung), making it a biomass energy source.
D) Coal is formed from ancient organic matter (plants) under heat and pressure over millions of years. While originated from biomass, it is classified as a fossil fuel and is distinct from renewable biomass sources used today.
B) A nuclear reactor generates energy through nuclear fission, typically using elements like uranium. This process involves the splitting of atomic nuclei and is not related to organic matter or biomass. Therefore, a nuclear reactor is not a biomass energy source.
Biomass energy is considered a renewable energy source (if harvested sustainably), whereas nuclear energy is non-renewable (as the fuel source, like uranium, is finite). Fossil fuels (coal, oil, natural gas) are also non-renewable energy sources derived from ancient biomass.
Biomass can be directly burned for heat/electricity (like wood), or converted into other forms of fuel like biogas (methane) or biofuels (ethanol, biodiesel). Nuclear energy harnesses the energy released from the strong nuclear force within atoms.
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