Branch connected with nomenclature, identification and classification is

Branch connected with nomenclaturem identification and calssification is or The study of theory, practice and rules of classification of living and exinct organisms is called

________ deals with the identification and classification of organism.

________ deals with the identification and classification of organism.

The term 'systematics' refers to : (a) different kinds of organisms and their classification (b) diversity of kinds of organisms and their relationship (c) identification and classification of organisms (d) nomenclature and identification of animals and plants

How is a key helpful in identification and classification of organisms?