We have three blocks. Lets call them A, B and C. Block A contains a medium blue square and a big yellow circle. Above the big yellow circle is the medium blue square. Above block A there is block B which has one medium black circle and a small yellow square. Below, to the left of and near to the small yellow square is the medium black circle. Above block A there is block C. It contains a small black triangle and a big yellow square. To the right of and far from the big yellow square is the small black triangle.
What is above the big yellow circle? a medium black circle or a small yellow square?
medium black circle  small yellow square  both of them none of them