Binomial nomenclature is a system of nomenclature in which all living things are given specific scientific name. Scientific name consist of two parts, the first part is genus name and the second part is species name. Two different species can have the same name if they belong to different genera. For example, Pinus glabra (Cedar pine) and Ilex glabra (Inkberry). The species name can be same as of genus. This is called as tautonym. A tautonym is a scientific name of a species in which both parts of the name, that is genus and species, have the same spelling. For example Rattus rattus for black rat.
Thus, the correct answer is option A.