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