Correct Answer - Option 3 : Ha!
The correct answer is Ha!
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Hush! is an exclamation that is used to make (someone) be quiet or stop talking.
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Alas! is an exclamation that is used to express grief, pity, or concern.
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Ha! is an exclamation that is used to express surprise, joy, or triumph
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Bravo! is an exclamation that is used to express approval when a performer or other person has done something well.
Thus from the given points, we find that the correct answer is Ha!