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