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 of the following taxonomic categories is being described by the given statements $(i-iii)$?
$(i)$ It is the basic unit of classification.
$(ii)$ It is defined as the group of individuals which resemble in their morphological and reproductive characters and interbreed among themselves and produce fertile offspring.
$(iii)$ Human beings belong to the species $sapiens$ which is grouped in the genus $Homo$.

Potato and brinjal belong to the genus $Solanum$,which reflects that

Describe the binomial nomenclature.

Give a scientific reason: Classification is essential for understanding the inter-relation among living organisms.

Assertion $-A$: Carolus Linnaeus is known as the father of taxonomy.
Reason $-R$: The classification system proposed by him is still accepted today after some modifications.