There are three blocks, A, B and C. Block A has a small yellow square. Block B is to the right of block A. It contains a small yellow circle, a big black circle and a big black square. A small black square is also in this block. The small yellow circle is to the left of and above a medium blue circle. Below and to the right of the small black square there is the big black circle. This object is touching the right edge of this block. The medium blue circle is touching the right edge of this block. This shape is below the small black square. Finally, we have block C to the left of block A. It contains a medium black circle.
What is to the right of the small black square? a big black circle or a medium black circle?
big black circle  medium black circle  both of them none of them