We have three blocks, A, B and C. Block A is above and C is below B. Block A has a big black triangle. Block B contains a medium black triangle. The medium black triangle is to the left of and below a small black square. Block C has a medium yellow square and one medium black triangle. The medium yellow square is below the medium black triangle. The medium black triangle is touching the right edge of this block.
Which object is above a yellow object? the small black square or the big black triangle?
the small black square  the big black triangle  both of them none of them