Correct option is D
a. Homonym refers to two or more scientific names that have the same spelling but are applied to different nominal taxa. This matches with iv in Column Y: "two or more specific or subspecific scientific names with the same spelling, but for different nominal taxa."
b. Tautonym refers to a binomial name where the genus and species names are identical. This corresponds to i in Column Y: "binomial name contains the same epithet for both the genus and species."
c. Basionym refers to the original name of a taxon on which a new combination is based. This matches with iii in Column Y: "original name of a taxon on which a new combination is based."
d. Hemihomonym refers to the same binomial name being given to both a plant and an animal. This corresponds to ii in Column Y: "same binomial name given to a plant and an animal."
Information Booster:
- Homonym: In taxonomy, a homonym occurs when two organisms are given the same scientific name but belong to different taxa.
Example: Rattus rattus
This name is used for two different species:
- Rattus rattus (the black rat, a rodent species).
- Rattus rattus (a species of moth in the family Crambidae).
- Tautonym: Tautonyms are used in cases where the genus and species names are identical, such as Gorilla gorilla.
- Basionym: A basionym is the original name of a species or taxon, and subsequent name changes often reference this original name.
Example: Panthera leo
1. Original Basionym: Felis leo (Linnaeus, 1758) — The lion was initially classified under the genus Felis.
2. New Combination: Panthera leo (Linnaeus, 1758) — Later, it was moved to the genus Panthera, but Felis leo remains the basionym.
- Hemihomonym: This occurs when the same scientific name is used for both a plant and an animal species, like Gorilla gorilla for the animal and Gorilla genus for plants.


