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