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