The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Systematics is the study of the biological diversity of the organisms and their evolution. Taxonomy is considered as a part of systematics which deals with biological classification. Classification systems help to arrange the organisms in groups on the basis of their similarities and differences. The classification system also helps to study relationships, traits, identify the organisms and provide a name. The main aim of the classification system is to reflect evolutionary relationships among organisms.
Thus, the correct answer is option B.