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