Which sentence is wrong because it's not parallel? grandad's tomato was not only the biggest one at the fair but also the winner of the blue ribbon. not only was grandad's tomato bigger than all others at the fair but also the winner of the blue ribbon. not only was grandad's tomato bigger than all others at the fair, but it also won the blue ribbon. not only was grandad's tomato the biggest one at the fair, but it was also the winner of the blue ribbon.