Given the question: Information: - Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc. The word "slug" is also often used as part of the common name of any gastropod mollusc that has no shell, a very reduced shell, or only a small internal shell, particularly sea slugs and semislugs (this is in contrast to the common name "snail", which applies to gastropods that have a coiled shell large enough that the animal can fully retract its soft parts into the shell). - Polyceroidea is a taxonomic superfamily of sea slugs, specifically dorid nudibranchs, marine gastropod mollusks in the clade Doridacea. - Doridacea is a taxonomic grouping of dorid nudibranchs, shell-less marine gastropod mollusks. included in the clade Euctenidiacea of the clade Nudibranchia. - Gymnodorididae is a taxonomic family of sea slugs , dorid nudibranchs , gastropod molluscs in the superfamily Polyceroidea . This family has no subfamilies . After reading the paragraphs above, we are interested in knowing the entity with which 'gymnodorididae' exhibits the relationship of 'parent taxon'. Find the answer from the choices below. Choices: - animal - doridacea - nudibranchia - polyceroidea
The answer is:
nudibranchia