Which statement is correct regarding dogs,rice,and mammals?

Read the following statements :
$(i)$ Classification is a single step process.
$(ii)$ Classification involves a hierarchy of steps in which each step represents a rank or category.
$(iii)$ Taxon is a unit of ecological hierarchy.
$(iv)$ Mango does not represent any taxon.
$(v)$ Taxonomic categories are distinct biological entities and not merely morphological aggregates.
How many of the above statements are correct?

Identify the correct terms for the following analogies:
$(i)$ Cat : Felidae :: Dog : ....
$(ii)$ Scientific name of Mango : Mangifera indica :: Wheat : .....

Taxonomy is defined as..........

The first act in taxonomy is

What knowledge is required to classify organisms into different categories?