This task involves asking a question, providing a set of 2 options. You are expected to choose the best answer to the question. The output will be in the form of A or B, corresponding to which option is chosen.

[Q]: Question:After the murder of his children's nanny, Sandra Rivett, Richard John Bingham disappeared on 8 November 1974, was presumed deceased on 11 December 1992 and declared legally dead in October 1999. By what name is he better known? ,  Options: [A.Richard Bingham B.Alexander Aizenshtat] 
[A]: B


[Q]: Question:The Guinness Book of Records was first published in what year? ,  Options: [A.1967 B.1955] 
[A]: B


[Q]: Question:The island of Tasmania is governed by which country? ,  Options: [A.Australia B.India]
[A]:
A