There are three blocks. We call them A, B and C. Two medium black squares are in block A. Below medium black square number two there is medium black square number one. Then, there is block B. It contains one medium blue square. There is also a medium black square in this block. The medium blue square is touching the bottom edge of this block. This object is below the medium black square. Block C is above block B and to the left of block A. It contains a medium yellow square.
What is below the yellow thing? a medium black square which is in block B or a medium black square number one?
medium black square  which is in block B medium black square  number one both of them none of them