There are two blocks, A and B. Block A is below B. Block A has one big blue circle. Near to, above and to the left of a small yellow square is the big blue circle. Block B contains a big blue triangle, a small yellow square and one medium blue triangle. A small black triangle is touching the bottom edge of this block. It is to the left of and below the small yellow square which is below the medium blue triangle.. Near to and below the small yellow square is the big blue triangle.
What is below the black object? a small yellow square or a medium triangle?
small yellow square  medium triangle  both of them none of them