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