Why is the manner of Macdfuffs' birth important

He was born by caesarean section and fullfilled the witches prophecy the only a man not born of a woman could kill Macbeth. The correct option in regards to the given question is option "a". Macduff was the person that was born by caesarean section and also he was the person that killed Macbeth in William Shakespeare's Macbeth. Macduff was introduced into the play by Shakespeare in act 2 of scene 3. He was the first to see the dead body of King Duncan. He suspected Macbeth to be the killer of the king from the moment he saw the dead body of the king.