The correct option is C Extinct species
The IUCN Red List categories and criteria are intended to be an easily and widely understood system for classifying species at high risk of global extinction.
It divides species into nine categories- Not evaluated, data deficient, least concern, near threatened, vulnerable, endangered, critically endangered, extinct in the wild and extinct.
When the last surviving individual of a species has died then the species is considered as extinct and the bird dodo (Raphus cucullatus) belongs to the list extinct.
Endangered species are those that have a high risk of extinction in the near future and critically endangered species are the species that are at high risk of extinction in the immediate future.
The species which are at lower risk of extinction are categorised in the least concern category.