Who proposed a five-kingdom classification and named kingdoms as Monera, Protista, Fungi, Plantae, and Animalia?

R.H. Whittaker in 1969 introduced a Five Kingdom Classification. The kingdoms characterized by him were titled Monera, Protista, Fungi, Plantae, and Animalia. The main principle for analysis used by him includes the complexity of cell structure (it may be eukaryotic or prokaryotic), the complexity of organisms (unicellular or multicellular), thallus organization, mode of nutrition (autotrophs or heterotrophs or acrophobic), reproduction (sexual or asexual) and phylogenetic relationships (prokaryotes to eukaryotes, unicellular to the multicellular organism). So, the correct answer is R.H. Whittaker.