We have three blocks. Lets call them A, B and C. There is one medium blue square in block A. A medium yellow square is touching the bottom edge of this block. Below a medium black square there is the medium blue square. Below the medium blue square is the medium yellow square. It is below the medium black square. Then, we have block B which has a medium blue square. To the left of block A and below block B there is block C. It contains a medium black square.
Which object is above a medium black square? the medium blue square that is in block B or the medium blue square which is in block A?
the medium blue square  that is in block B the medium blue square  which is in block A both of them none of them