We have three blocks, A, B and C. Block C is to the left of A. Block A is below B. Block A contains a small blue circle. Block B has two small black squares. Above a medium black square is small black square number one. It is near to and below small black square number two. Block C contains one big yellow square, a small black circle and a small black square. Above the small black square which is above a big blue triangle there is the small black circle. The big blue triangle is touching the bottom edge of this block. The big yellow square is touching the bottom edge of this block. This shape is below the small object which is above the small black square. It is to the right of the big blue triangle. The small black circle is above the big blue triangle.
What is below the small black circle? a medium black square or a small black square?
medium black square  small black square  both of them none of them