There are three blocks. Lets call them A, B and C. Block A contains a medium yellow square, a medium blue square and a medium black square. The medium yellow square is touching the bottom edge of this block. Below the medium black square is the medium blue square. The medium yellow square is below the medium blue square. It is below the medium black square. Block B is below block A. It contains one medium black square. To the left of block A there is block C with a medium blue square in it.
What is below the yellow object? a medium black square that is in block A or a medium black square which is in block B?
medium black square  that is in block A medium black square  which is in block B both of them none of them