The correct answer is option B.
In Mark Twain's "The Prince and the Pauper," poor Tom Canty and Prince Edward of Wales are born on the same day and look exactly like each other. When they meet they decide to trade places, in order to get to know what it would be like for Tom to be a prince and for Edward to be a poor person. So Tom pretends to be Prince Edward and live in the palace, and at the same time, Edward pretends to be poor Tom and live with Tom's alcoholic father.