We have three blocks, A, B and C. There are a medium black square, one medium yellow square and a medium blue square in block A. The medium yellow square is below the medium blue square. The medium black square is below the medium blue square and the medium yellow square. Below block A there is block B. It contains one medium black square. Finally, we have block C. It is below block A. It has a medium yellow 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 C?
the medium yellow square  which is in block A the medium yellow square  that is in block C both of them none of them