There are three blocks, A, B and C. Block A contains a medium black square and a medium yellow square. The medium black square is below the medium yellow square. Below block A we have block B which contains one medium yellow square and a medium black square. The medium yellow square is below the medium black square. To the right of block B there is block C which contains a medium black square.
Which object is below a medium black square? the medium yellow square which is in block A or the medium yellow square that is in block B?
the medium yellow square  which is in block A the medium yellow square  that is in block B both of them none of them