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