There are three blocks. We call them A, B and C. Block C is above B. Block B is above A. Block A contains a medium blue square. A medium yellow square is below the medium blue square. Block B has a medium black square, one medium yellow square and one medium blue square. The medium black square is below the medium yellow square and the medium blue square. The medium yellow square is below the medium blue square. Block C contains two medium black squares. Below medium black square number two there is medium black square number one. There is also a medium yellow square in this block. Below medium black square number one and medium black square number two is the medium yellow square.
Which object is below a medium blue square? the medium black square that is in block B or medium black square number one?
the medium black square  that is in block B medium black square  number one both of them none of them