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

How many of the following statements are correct?
$(A)$ Each taxonomic category is a unit of classification.
$(B)$ Taxonomic groups are distinct biological entities.
$(C)$ Genera are aggregates of closely related families.
$(D)$ Both vegetative and reproductive characters are used to characterise the families.

Assertion : Taxon and category are different things.
Reason : Category shows hierarchical classification.

The binomial nomenclature system of Linnaeus means that every organism has:

What kind of relationship between organisms can be inferred from classification?

Who is known as the father of taxonomy?