The rank given to groups of organisms arranged at different levels of classification is called ...........

Which of the following names used in the nomenclature of an organism is not used in the nomenclature of any other type of organism?

Which one of the following is a species?

Species are considered as

Match column-$I$ with column-$II$ and choose the correct option.

Column-$I$ (Biological name)	Column-$II$ (Class)
$A$. Homo sapiens	$I$. Dicotyledonae
$B$. Musca domestica	$II$. Mammalia
$C$. Mangifera indica	$III$. Monocotyledonae
$D$. Triticum aestivum	$IV$. Insecta

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?