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