Correct Answer: Option A
Explanation:
R.H. Whittaker's five-kingdom classification (1969) categorizes organisms into Monera, Protista, Fungi, Plantae, and Animalia. Monera includes all prokaryotes—bacteria, cyanobacteria, and archaebacteria—characterized by lack of true nucleus and membrane-bound organelles. Protista includes unicellular eukaryotes. Fungi are multicellular saprophytes. Plantae are autotrophic eukaryotes. Monera is the only kingdom of prokaryotes in this system.
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