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