What is so ironic about the closing of Act III in Much Ado Nothing?

In Act III of Much Ado About Nothing, the closing is marked by the engagement of Claudio and Hero, but it turns out to be a scene filled with irony.

- Benedick and Beatrice, who have constantly denied they care for each other, proclaim their love for one another.

- Claudio publicly rejects Hero at the altar when he is deceived into believing she is unfaithful.

- Don Pedro unwittingly played a critical role in the deception, which he does not intend to do.

- In the closing sentences, Benedick announces his intention to marry Beatrice, creating another ironic twist.

The closing scene ends on an ambiguous note, as the audience is left wondering about the fate of Claudio and Hero's relationship and the consequences of the deception.