There are three blocks. We call them A, B and C. Block A is below block B and it is to the right of block C. Block A has a big blue circle. A medium blue square is touching the right edge of this block. The big blue circle is touching the bottom edge of this block. It is near to the medium blue square. Block B contains one small black circle. Below the small black circle is a medium black circle. And block C has one small blue circle and one big black square. The small blue circle is below the big black square.
What is below the small black circle? a big black square or a medium black circle?
big black square  medium black circle  both of them none of them