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