We have three blocks, A, B and C. Two medium blue squares are in block A. Below a medium yellow square is medium blue square number two. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two. It is below the medium yellow square. Then, there is block B with a medium blue square and one medium black square in it. Below the medium black square there is the medium blue square. Block C is above blocks B and A. It contains a medium blue square.
Which object is below a medium blue square? the medium yellow square or the medium black square?
the medium yellow square  the medium black square  both of them none of them