We have three blocks. We call them A, B and C. Block A contains one big yellow circle. Below block A is block B which contains a small blue square, a big black circle and one medium yellow triangle. The small blue square is to the left of the medium yellow triangle. This shape is near to and above the big black circle. Finally, we have block C which is to the left of block B. It contains one medium black square.
What is below the big yellow circle? a big black circle or a medium black square?
big black circle  medium black square  both of them none of them