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