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