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