There are two blocks. We call them A and B. Block A is above B. Block A contains a big blue triangle and one small black triangle. The big blue triangle is touching the right edge of this block. The small black triangle is touching the right edge of this block. The big blue triangle is below the small black triangle. Block B has one small black square, one small blue square and one small blue triangle. To the left of the small blue triangle is the small blue square. To the left of the small blue triangle is the small black square. The small blue triangle is touching the right edge of this block. The small black square is below the blue object which is to the left of the small blue triangle.
Which object is below a blue triangle? the small blue triangle or the small black triangle?
the small blue triangle  the small black triangle  both of them none of them