Who killed King Duncan?ALady MacbethBBanquoCMacbethDMacduffAnswer: C. Macbeth Read Explanation: In William Shakespeare's Macbeth, Macbeth kills King Duncan of Scotland in his castle.Macbeth and his wife Lady Macbeth plot to murder Duncan so Macbeth can become king. Macbeth believes in a witches' prophecy that he will be king. Read more in App