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 yellow square? the medium black square that is in block B or the medium black square that is in block A?
the medium black square  that is in block B the medium black square  that is in block A both of them none of them