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