どれ

どれ is an interrogative pronoun meaning "which one". It is used to ask someone to identify or select one item from three or more options. Unlike どの, which is a modifier that must be followed by a noun (e.g. どの本 "which book"), どれ stands alone as a pronoun and refers to a thing directly.

どれ vs. どちら

When choosing between two items, use どちら instead of どれ. どちら is also the more polite form and can be used in formal situations even with three or more options.

どれ vs. どの

どれ is a pronoun and replaces the noun entirely, while どの is a determiner and must come before a noun.

Common patterns

どれも means "all of them" or "none of them" (with negative verbs):

どれでも means "any one (of them)":