There are three blocks, A, B and C. Block A is above and B is below C. Block A has a medium black square and one small black square. The medium black square is touching the right edge of this block. It is to the right of and above the small black square. Block B contains one medium black triangle. And block C has a big yellow square and a big black circle. The big yellow square is below, to the right of and far from the big black circle.
What is above the yellow thing? a big black circle or a medium triangle?
big black circle  medium triangle  both of them none of them