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:Ivan Galamian has had world-wide influence as a teacher of what? ,  Options: [A.Violin B.Guitar] 

A: A
****
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:Dishes prepared with spinach can be referred to as what? ,  Options: [A.Spinach B.la Florentine]

A:
A
****