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 above a medium yellow square? the medium blue square that is in block B or the medium blue square which is in block A?
the medium blue square  that is in block B the medium blue square  which is in block A both of them none of them