Correct Option: C

The Critically Endangered White-rumped Vulture Gyps bengalensis and two other Indian species Gyps indicus and Gyps tenuirostris have suffered a population decline of more than 99.9% in just 15 years. According to IUCN, these declines have been directly attributed to the veterinary use of the non-steroidal anti-inflammatory drug diclofenac, ingested by vultures that ate carcasses of cattle.