The correct answer is option 1, Leopard. The scientific name for Leopard is Panthera pardus. The scientific names of animals are written in a standardized format called binomial nomenclature. In this format, the first part of the name indicates the genus to which the species belongs, and the second part indicates the specific name of the species. In the case of Panthera pardus, Panthera is the genus name and pardus is the specific name.
Option 2, Tiger, has the scientific name Panthera tigris, so it is not the correct answer. Option 3, Lion, has the scientific name Panthera leo, so it is also not the correct answer. Option 4, Panther, is not a specific species but a general term that can refer to various species of big cats. Therefore, it is not the correct answer.