You will be given a definition of a task first, then some input of the task.
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.

Henry Wallis (1830--1916) was an English Pre-Raphaelite painter, writer and collector. Born in London on 21 February 1830, his father's name and occupation are unknown. When in 1845 _his_ mother, Mary Anne Thomas, married Andrew Wallis, a prosperous London architect, Henry took his stepfather's surname. <sep>, Pronoun: his <sep>, A: Andrew Wallis <sep>, B: Henry
Output:
B