There are three blocks, A, B and C. Block A has a small black circle. Block B is below block A. It contains one small blue circle, a small black square and a medium black square. Above and to the left of the medium black square there is the small blue circle.. The small black square is above and to the left of the medium black square. To the right of block A there is block C with a big black square and one small blue circle in it. The small blue circle is touching the right edge of this block. The big black square is to the left of the small blue circle.
What is to the left of the medium shape? a small black square or a small blue circle?
small black square  small blue circle  both of them none of them