NCERT Solution: Biological Classification
Viruses are non-cellular organisms but replicate themselves once they infect the
host cell. To which of the following kingdom do viruses belong to?
(a) Monera
(b) Protista
(c) Fungi
(d) None of the above
NCERT Exampler
Ans. (d) None of the above
Since viruses are considered as borderline case between living and nonliving things; no kingdom has been specified for them.