We have three blocks, A, B and C. Block A has one medium black triangle. Then, there is block B which has a medium blue triangle. A big blue circle is touching the right edge of this block. It is above and to the right of the medium blue triangle. Below block B and to the right of block A there is block C. It contains one small black square. A small yellow square is touching the bottom edge of this block. It is to the left of and near to the small black square.
What is above the yellow thing? a small black square or a medium black triangle?
small black square  medium black triangle  both of them none of them