We have three blocks, A, B and C. There is one medium black circle in block A. Block B is to the left of block A. It contains one small yellow circle and one small blue triangle. The small yellow circle is touching the bottom edge of this block. To the right of and near to the small blue triangle there is a small black square. Near to and below the small black square there is the small yellow circle. To the right of block B there is block C with one big blue circle, one small blue triangle and one medium blue square in it. The big blue circle is to the right of the medium blue square. It is above and to the left of the small blue triangle.
Which object is to the left of a medium black circle? the medium blue square or the small black square?
the medium blue square  the small black square  both of them none of them