There are two blocks, A and B. Block A is below B. Block A has one small blue square. Block B contains one big black triangle and one medium blue circle. This block also contains a medium black circle. This block also has a medium black square. The medium blue circle is touching the top edge of this block. The big black triangle is below the medium blue circle. Below the medium blue circle and the medium black square there is the medium black circle.
What is above the blue square? a medium black circle or a medium black square?
medium black circle  medium black square  both of them none of them