Which of the following kingdoms has/have only unicellular organisms?

Which of the following kingdoms has/have only unicellular organisms?

Monera only
Protista only
Monera and Protista both
Protista and Fungi both
This question was previously asked in
UPSC NDA-2 – 2018
The kingdom Monera consists only of unicellular organisms.
– In the five-kingdom classification system, Monera includes all prokaryotic organisms, such as bacteria and cyanobacteria, which are exclusively unicellular.
– Protista primarily consists of unicellular eukaryotic organisms, but some simple multicellular or colonial forms are also classified under Protista depending on the system.
– Fungi includes both unicellular (like yeast) and multicellular organisms.
– Plantae and Animalia consist entirely of multicellular organisms.
The question asks which kingdom *only* has unicellular organisms. While Protista is predominantly unicellular, Monera is strictly unicellular. Thus, Monera is the most accurate answer meeting the condition of having *only* unicellular organisms.
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