Final answer:
The correct answer is option a. In Shakespeare's Macbeth, King Duncan's death is blamed on the grooms, his chamberlains, by Macbeth who is the actual murderer.
Step-by-step explanation:
The question pertains to the play Macbeth by William Shakespeare. In the play, after the murder of King Duncan, his death is initially blamed on the grooms, who are King Duncan's chamberlains. Macbeth, who is actually responsible for the murder, claims he killed the grooms in a fit of rage for their alleged crime.
This accusation against the grooms then becomes the widely accepted version of events among the characters in the play, leading to the grooms being unable to defend themselves as they are already dead.