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IUCN categorized major threatened species under :
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- seven classes
- five classes
- six classes
- four classes
- None of these
Correct Option: E
At present, the IUCN Red List of Threatened Species (also known as the Red Data List) lists eight classes of organism under the group of "threatened categories" of endangered; critically endangered, The classes of organism for which the 'threatened' tag is applied are: mammals; birds; reptiles; amphibians; fishes; insects; mollusks; and plants.
