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