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