IUCN stands for

International Unit for Conservation of Nature and Natural Resources

Indian Unit for Conservation of Nature and Natural Resources

International Union for Conservation of Nature and Natural Resources

International Unit for Conservation of Nature and National River

Solution

Correct option is C

IUCN or International Union for conservation of nature and natural resources is now called as world conservation Union, it has its headquarters at Morges Switzerland, it maintains a red Data Book or red list which is a catalog of threatened plants and animals facing risk of extinction.