The modern system of classification classifies organisms into how many kingdoms?

Which classification system was proposed by $R.H. Whittaker$?

Natural system of classification was developed by

Read the following four statements $(A-D)$ carefully.
$(A)$ Viruses,viroids and lichens are not included in the five kingdom system of classification.
$(B)$ The mode of nutrition in kingdom animalia is holophytic.
$(C)$ Phycomycetes,Ascomycetes,Basidiomycetes and Deuteromycetes are the four families of kingdom fungi.
$(D)$ Bacteria are cosmopolitan in distribution.
How many of the above statements are not correct :

Mention the merits and demerits of the five-kingdom classification system.

In the three-domain system of classification,how are prokaryotic and eukaryotic organisms divided into domains?