There are two blocks. We call them A and B. Block A is to the right of B. Block A has a big black triangle. Block B contains one medium black triangle and one small blue triangle. A medium yellow square is touching the right edge of this block. Below the small blue triangle and a big black circle there is the medium black triangle. The big black circle is touching the right edge of this block. The medium yellow square is to the right of the small blue triangle.
Which object is to the left of a big black triangle? the medium black triangle or the small blue triangle?
the medium black triangle  the small blue triangle  both of them none of them