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