There are two blocks, A and B. Block A has one medium blue circle and one big black triangle. A big black circle is also in this block. To the right of the big black triangle and the big black circle is the medium blue circle. Block B is above block A. It has one medium yellow triangle, a small yellow square and a medium black circle. A small blue circle is also in this block. The medium yellow triangle is to the right of a big blue circle. It is below the small yellow square which is above the big blue circle. The small yellow square is to the left of the small blue circle.. The medium black circle is to the right of and below the small blue circle.
What is below the small blue circle? a yellow square or a big black triangle?
yellow square  big black triangle  both of them none of them