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