Which of the following is a taxonomic category?

Assertion $(A)$: Maize is included in the class Monocotyledonae.
Reason $(R)$: This class does not contain any orders.

In the binomial nomenclature of an organism,which name is written in lowercase letters?

Select the correct statements $(i-iv)$ regarding taxonomic categories.
$(i)$ Each step or rank in hierarchy is called taxonomic category.
$(ii)$ Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
$(iii)$ Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom,phylum or division,class,order,family,genus and species.
$(iv)$ Lower the category,greater is the difficulty of determining the relationship to other taxa at the same level.

The scientific naming of animals is based on the principles and criteria provided by which organization?

Each genus $:-$