Which of the following is the only taxonomic category that has a real existence?

Rice,cereals,monocots and plants represent

The common characteristics between tomato and potato will be maximum at the level of their

In which of the following are the works of Bentham and Hooker $NOT$ useful?

Cat is included in which family?

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.