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.

Overeem was rumored to make his first title defense against Heavyweight Brett Rogers on June 6 at , however a hand injury scuttled plans for the fight. According to Golden Glory manager Bas Boon, Overeem had suffered a hand infection following a nightclub brawl early May 2009. According to Boon, Alistair and _his_ brother Valentijn - both heavyweights - had been involved in an altercation that left five security staff needing hospital treatment and nearly cost Alistair his hand. <sep>, Pronoun: his <sep>, A: Boon <sep>, B: Alistair
Output:
B