The nouns are chapters and essay.
That Billy finally has a<u> gun</u> on him after the bombing that he didn’t have earlier in the war is ironic. Hence, the correct answer is option C. a gun.
<h3>What is an irony?</h3>
An irony is a state of affairs or an event that seems deliberately contrary to what one expects and is often wryly amusing as a result. An irony is also a literary device, originally used in Greek tragedy, through which the essence of a character's words or actions is clear to the audience or reader although unknown to the character.
Therefore, the fact that Billy finally has a gun on him after the bombing that he didn’t have earlier in the war is ironic for it was of no use anymore as at the time he has it.
learn more about irony: brainly.com/question/26138104
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