Which is the highest taxonomic category that includes all other groups of organisms?

The term species was coined by

What is the taxonomic rank of $Rhizobium$?

Which of the following is the correct ascending order of the taxonomic hierarchy based on the number of organisms?

Match Column-$I$ with Column-$II$ for the classification of the housefly and select the correct option using the codes given below:

Column-$I$	Column-$II$
$(a)$ Family	$(i)$ Diptera
$(b)$ Order	$(ii)$ Arthropoda
$(c)$ Class	$(iii)$ Muscidae
$(d)$ Phylum	$(iv)$ Insecta

Arrange the following taxonomic categories in ascending order.
$(a)$ Genus
$(b)$ Class
$(c)$ Order
$(d)$ Phylum
$(e)$ Family
$(f)$ Kingdom
$(g)$ Species
Choose the correct answer from the options given below: