We have three blocks. We call them A, B and C. One small black triangle, one big yellow triangle and a medium black square are in block A. Below the big yellow triangle is the small black triangle. The big yellow triangle is near to, above and to the right of the medium black square. Then, there is block B which contains one medium yellow square. Finally, above block B we have block C which is below block A. It contains one medium yellow square, one small yellow circle and a big blue square. The small yellow circle is to the left of a medium blue square and the big blue square. The medium yellow square is to the right of the small yellow circle and the big blue square. This object is below the medium blue square.
Which object is above a medium yellow square? the big blue square or the medium blue square?
the big blue square  the medium blue square  both of them none of them