The correct option is B Taxonomy
Taxonomy is the science that deals with the characterisation, identification, classification and nomenclature of living organisms.
Systematics deals with the study of evolutionary relationship between organisms.
Nomenclature is the science of assigning a scientific name to a living organism.
Phylogeny is the evolutionary history and the course of development of a species or a group of organisms. The study of phylogeny is called phylogenetics.