There are three blocks. We call them A, B and C. Blocks A and B are to the left of C. Block A contains one medium black circle. Block B contains one small black square, one medium blue circle and one small black triangle. The small black square is to the left of and above the small black triangle. To the right of the small black triangle is the medium blue circle. And block C has a medium yellow triangle.
What is to the left of the medium triangle? a small black triangle or a blue circle?
small black triangle  blue circle  both of them none of them