Let’s examine the sentence: “He is getting his latest novel _______ next month.” The verb ‘getting’ shows that the action is toward some end but a verb is required to describe this action. If we see the options, we notice that the action of ‘publishing’ is required by the sentence. However, the form of this verb should match with the form of the previous verb, ‘getting.’ Only the past participle or third form of the verb would go with ‘getting.’ Hence, Option C is the correct answer. Other options cannot be used as they would make the sentence structure incorrect.