Which conspirator is the last to stab caesar? cassius casca trebonius brutus?

The correct answer is Brutus.

Explanation:

Brutus was the last of the conspirators to stab Caesar, Casca being the first to do so, stabbing him in the upper shoulder. The betrayal of Brutus was somewhat surprising to the audience and to Caesar himself, who exclaimed the words: "Et tu Brute?" as saying: you too, Brutus?

This was a great astonishment for everyone since Brutus was Caesar's best friend and biggest confidant, and he was the last one expected to do something like that.

Even Brutus was in charge of convincing Caesar to go, since he suspected something might happen, however Brutus managed to convince him.

Brutus was considered the symbol of all that is right, and he even believes that killing Caesar was the right thing to do.

lemme actually be useful and say i believe the answer is the first one.