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