There are three blocks, A, B and C. One medium black square is in block A. Below a medium blue square is the medium black square. Above block A we have block B with one medium yellow square in it. Below block A there is block C which has one medium black square and a medium yellow square. The medium black square is below the medium yellow square.
Which object is below a medium square? the medium yellow square which is in block B or the medium yellow square which is in block C?
the medium yellow square  which is in block B the medium yellow square  which is in block C both of them none of them