Read the example sentence and study the chart of prefixes.The tourists discarded the brochure because its out-of-date information was irrelevant.PrefixDefinitionanti-againstante-beforetrans-acrossirr-not

The prefix “ir-” means “not.” In “irrelevant,” it changes “relevant” to “not relevant,” meaning unimportant or unrelated to the topic. Therefore, the best choice is “unimportant for a given topic.”

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