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