There are three blocks, A, B and C. There are a big black triangle, one medium black square and one small blue triangle in block A. To the right of a small black square there is the big black triangle. To the right of the small black square which is above the small blue triangle there is a medium yellow circle. To the left of a big yellow square is the medium black square. This object is touching the small blue triangle. Then, there is block B with a small yellow circle in it. There is also a medium black square in this block. The medium black square is near to and above the small yellow circle. Finally, we have block C which is to the right of block A and block B is below it. It contains one small yellow square. A medium blue circle is near to and below the small yellow square. A big blue square is touching the right edge of this block. This shape is to the right of the small yellow square.
Which object is above a medium black square? the medium yellow circle or the small yellow circle?
the medium yellow circle  the small yellow circle  both of them none of them