Hint: Antelope cervicapra is an animal that is native to mainly India, Pakistan, and Nepal, the Indian subcontinent. They are herbicides and are found primarily in the wilderness. Their numbers have decreased significantly due to different causes, such as climate change and hunting, etc.
Complete answer: The International Union for Nature Conservation is an organization established to conserve and ensure the sustainable use of natural resources. The organization's standards protect animals which are a part of the natural resource. The organization, according to their numbers, enlisted animals in different groups.
-A vulnerable species is a species that is effectively listed as endangered by the International Union for Nature Conservation until circumstances that threaten and replicate it change.
-A species under threat is a species that is categorized as extinct most possibly via the IUCN.
-The International Union for Conservation of Nature (IUCN) has listed a species as being at high risk of expiry in the wild as critically endangered species (CR).
-An endangered species in the wild is a species listed by the International Union for Natural Conservation as being only recognized by living members who are kept outside their historical range as a naturalized population due to a significant reduction in habitat.
-The Blackbuck (Antilope cervicapra) is the only animal species in the Antelope genus. The Antelope is a threatened species.
So, B-'Endangered' is the right response.
Note: In India, Black Buck hunting constitutes a punishable crime and a fine of 3-7 years' imprisonment. The species is mentioned in the 1972 Wildlife Protection Act, schedule one. The Black Bucks live in National Parks and sanctuaries because of their endangered existence. National Park Gir Forest and Black Buck Sanctuary of Ranebennur are among the protected lands that this animal is residing in.