Definition: In this task, you will be presented with a text, a pronoun from the text, and two candidate names. You should determine what the pronoun refers to and classify the answers into A, B, or Neither. A and B here are referring to option A and option B. Position of the pronoun in the text is showed within two "_"s.
Input: The novel of When Knighthood Was in Flower, by Edwin Caskoden (the pen name of Charles Major) was published in 1898, and was the source material for both the Davies and the Disney films. She was also fictionalized in the historical fiction novel The Last Boleyn by Karen Harper. The drama series The Tudors : portrays the relationship between Mary and Charles Brandon, though the character is named Princess Margaret, and is a composite of Mary and _her_ sister Margaret Tudor, portrayed by Gabrielle Anwar. <sep>, Pronoun: her <sep>, A: Princess Margaret <sep>, B: Mary

B