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