The correct option is D None of the above
Virus are non-cellular entities. They have no nucleus, no organelles and no cell membrane. They are made up of a nucleic acid (DNA or RNA) that is wrapped in a protein coat or capsid.
Viruses are generally not considered to be true living organisms since they can replicate only once they infect an animal, plant, or bacterial cell. They cannot replicate outside the host cells. Hence, they do not belong to any of the five kingdoms of living organisms.