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.
Which object is to the left of a medium triangle? the small black square or the medium blue circle?
the small black square  the medium blue circle  both of them none of them