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: Riadh Ben Aissa, in 2009 the president of the construction division at SNC-Lavalin (SNC), was told that his firm's proposal to build McGill University's new super-hospital was faulty. However, someone on the McGill University Health Centre (MUHC) had illegally given him a copy of the OHL consortium architectural drawings, which were favoured by the clinicians. Charles Chebl, who at the time was working under Ben Aissa and has since replaced _him_ as head of construction for SNC, testified in May 2014 that Ben Aissa told him to incorporate the OHL design into a hasty revision of SNC's plan. <sep>, Pronoun: him <sep>, A: Charles Chebl <sep>, B: Ben Aissa
Output:
B