Luna took a deep breath to relax herself before starting the test is the statement used in the infinitive form of the verb relax. As the author talking about the third person in past participle form.
<h3>What is infinitive form?</h3>
The infinitive form of a verb is written with the phrase "to + verb." "To stroll," "to read," and "to eat" are some examples. Nouns, adjectives, and adverbs can all be used with infinitives.
The significance of the word "to" cannot be overstated. Although "to" can be used as a preposition, in this case it is a component of the verb.
Thus, option B is correct.
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