Given the task definition and input, reply with output. 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.

William, who became emperor after Frederick's death, shared none of his parent's liberal ideas; his mother viewed him as a ''complete Prussian''. This difference in ideology created a rift between William and his parents, and relations between them were strained throughout their lives. When _his_ father succeeded to the Prussian throne as King William I on 2 January 1861, Frederick became the Crown Prince. <sep>, Pronoun: his <sep>, A: King William <sep>, B: Frederick
B