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