Genus is a taxonomical rank used in the classification of organisms on a biological basis.
Genus represents a group of closely related species of plants and animals.
So, the correct option is C - Genus refers to a taxonomic category comprising of a group of closely related plants and animals.

| List - I | List – II | ||
| A. | Lemur | i. | Flying phalanger |
| B. | Bobcat | ii. | Numbat |
| C. | Anteater | iii. | Spotted cuscus |
| D. | Flying squirrels | iv. | Tasmanian tiger cat |