There are three blocks, A, B and C. A medium black square is in block A. Block B is above block A. It contains one medium black square. Finally, we have block C below block A. It contains one medium black square and one medium blue square. Below a medium yellow square is the medium black square. This object is below the medium blue square. The medium black square is touching the bottom edge of this block. The medium yellow square is below the medium blue square.
Which object is below a medium black square? the medium yellow square or the medium blue square?
the medium yellow square  the medium blue square  both of them none of them