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