There are two blocks. We call them A and B. Block A is to the right of B. Block A has one small black triangle. One medium yellow square is also in this block. The medium yellow square is above the small black triangle. Block B contains one small yellow circle, one big black square and a medium black circle. Below the medium black circle and the big black square is the small yellow circle. The big black square is touching the right edge of this block. It is below the medium black circle.
What is below the black square? a small yellow circle or a medium black circle?
small yellow circle  medium black circle  both of them none of them