There are three blocks, A, B and C. There are a big blue circle and one big black triangle in block A. The big blue circle is touching the bottom edge of this block. It is below the big black triangle. To the right of block A is block B. It contains one small black circle. Above block A there is block C. It contains one big black circle and one medium blue circle. To the right of the medium blue circle there is the big black circle.
What is above the triangle? a small black circle or a medium blue circle?
small black circle  medium blue circle  both of them none of them