There are three blocks, A, B and C. Block C is above A. Block A is below B. Block A contains a medium black square. Block B contains two medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. There is also one medium black square in this block. It is below medium yellow square number two. Below the medium black square and medium yellow square number two is medium yellow square number one. And block C contains a medium black square and one medium yellow square. The medium black square is below the medium yellow square.
Which object is below a medium yellow square? the medium black square which is in block A or the medium black square that is in block B?
the medium black square  which is in block A the medium black square  that is in block B both of them none of them