There are three blocks. We call them A, B and C. Block A is above block B and to the right of block C. Block A contains two big blue triangles. Big blue triangle number one is to the right of big blue triangle number two. Big blue triangle number two is to the left of a medium yellow square. This block also has a big black triangle. Big blue triangle number one is to the left of, near to and above the medium yellow square. The medium yellow square is touching the bottom edge of this block. Block B contains one small blue square. And block C has a small black circle. Below and to the left of the small black circle there is a medium yellow square.
What is below the big black triangle? a small black circle or a medium yellow square?
small black circle  medium yellow square  both of them none of them