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