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