There are three blocks. We call them A, B and C. Block A has one small yellow circle. A big blue square is touching the bottom edge of this block. Below the small yellow circle there is a big blue circle. The big blue square is far from, below and to the left of the small yellow circle. Below block A is block B. It contains a big black square. Above block A there is block C. It contains one medium yellow circle.
What is below the medium object? a black square or a big blue circle?
black square  big blue circle  both of them none of them