The correct answer is the Red List. ● International Union for Conservation of Nature(IUCN), is an international organization (NGO) working in the field of nature conservation and sustainable use of natural resources. ∘Headquarters: Gland, Switzerland. ● Red List ∘The IUCN compiled and published the IUCN Red List which assesses the conservation status of species world wide. ● Grouping of three categories 1.Lower Risk 2.Threatened ■ Vulnerable ■Endangered ■Critically Endangered 3.Extinct ● Nine groups of IUCN Red List ∘ Extinct: No known individuals remaining. ∘ Extinct in the wild: Known only to survive in captivity ∘Critically endangered: Extremely high risk of extinction in the wild. ∘Endangered: High risk of extinction in the wild. ∘ Vulnerable: High risk of endangerment in the wild. ∘Near threatened: Likely to become endangered in the near future ∘ Least concern: Lowest risk ∘ Data deficient: Not enough data to assess its risk ∘Not evaluated: has not yet been evaluated against the criteria. ●Some Critically endangered species of India ∘ Pygmy Hog ∘ White-backed Vulture ∘ Gharial