I need some examples of dramatic irony in Act 1 and Act 2 of Hamlet.Who are the characters involved in the irony? Is it sympathy or antipathy?

In the final scene of Act I, the Ghost appears to Hamlet and tells him that his uncle, Claudius, murdered Hamlet's father. Because the audience knows this, and no other character other than Hamlet knows it, this dramatic irony creates suspense and conflict.

In Act II, scene 1, Ophelia tells her father that Hamlet came to see her and acted very strangely. The audience knows from the previous scene that Hamlet is pretending to be insane, but Ophelia is unaware. This is another example of dramatic irony.

Sympathy and antipathy are opposite emotions. An audience that feels sympathy for a character likes him or her. When the character elicits feelings of antipathy in the audience, they dislike the character.