What is meant by botanical nomenclature?

In the taxonomic hierarchy from Kingdom to Species,which of the following occurs?

Brassica campestris Linn
$(a)$ Give the common name of the plant.
$(b)$ What do the first two parts of the name denote?
$(c)$ Why are they written in italics?
$(d)$ What is the meaning of Linn written at the end of the name?

Select the correct option from the following statements:
$(i)$ Flora/Monograph provides information for identification of names of species found in an area.
$(ii)$ Each category,referred to as a unit of classification,is termed as a taxonomic category/taxonomic rank.

In hierarchical classification,the class is interpolated between:

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

$A$. Family	$I$. tuberosum
$B$. Kingdom	$II$. Polymoniales
$C$. Order	$III$. Solanum
$D$. Species	$IV$. Plantae
$E$. Genus	$V$. Solanaceae