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