There are three blocks, A, B and C. Block A contains a medium blue triangle. Above block A is block B with a medium yellow circle in it. Above block A there is block C which contains one big blue circle, a small yellow triangle and one medium yellow circle. The big blue circle is to the left of, near to and below the medium yellow circle. The small yellow triangle is below the medium yellow circle.
What is above the medium blue triangle? a big blue circle or a medium yellow circle?
big blue circle  medium yellow circle  both of them none of them