Correct Answer - Option 3 : Pun
The correct answer is 'Pun'
Let's see the meanings of the given options→
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Apostrophe→ An apostrophe is the mark ' when it is written to indicate that one or more letters have been left out of a word, as in 'isn't' and 'we'll'. It is also added to nouns to form possessives, as in 'Mike's car'.
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Climax→The climax of something is the most exciting or important moment in it, usually near the end.
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Pun→ A pun is a clever and amusing use of a word or phrase with two meanings, or of words with the same sound but different meanings.
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Oxymoron→If you describe a phrase as an oxymoron, you mean that what it refers to combines two opposite qualities or ideas and therefore seems impossible.
In the given sentence, we can see that 'A joke has been made in a clever way.' It is senseless to say that 'without geometry, life has no meaning.' so the correct answer is 'Pun'