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The part of speech which relate to NCOs is noun. It is the main subject about which the sentence talks about.

Given the sentence:

The only NCOs who are authorized to carry a sword are Marine NCOS.

There are eight parts of speech in English grammar, which are:

  • noun,
  • pronoun,
  • verb,
  • adjective,
  • adverb,
  • preposition,
  • conjunction, and
  • interjection.

In the given sentence, NCOs is the noun and 'to carry' is the verb.

Learn more about Parts of Speech on https://brainly.com/question/786588

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