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