Final answer:
Hamlet is the character who unknowingly drinks poison, leading to his death in Shakespeare's play.
Step-by-step explanation:
The person who dies by unknowingly drinking poison from the options provided is Hamlet. In the famous play written by William Shakespeare, The Tragedy of Hamlet, Prince of Denmark, the main character, Hamlet, dies after a duel in which he is wounded with a poisoned sword. He later drinks from a poisoned goblet that was intended for him by the King but was unaware of the poison. This tragic turn of events culminates in Hamlet's death, among others, by the end of the play.