There are three blocks, A, B and C. One medium yellow square is in block A. Below the medium yellow square there is a medium black square. To the left of block A there is block B. It has one medium blue square. Finally, there is block C below block B. It contains one medium yellow square and a medium black square. Below the medium black square and the medium yellow square is a medium blue square. Below the medium black square is the medium yellow square.
Which object is below a medium blue square? the medium yellow square that is in block A or the medium yellow square that is in block C?
the medium yellow square  that is in block A the medium yellow square  that is in block C both of them none of them