There are two blocks, A and B. One medium black square is in block A. This block also has a medium blue square. Below the medium blue square is the medium black square. Block B is above block A. It has one medium blue square. It also has one medium yellow square. The medium yellow square is below a medium black square and the medium blue square. The medium black square is below the medium blue square.
Which object is above a medium blue square? the medium black square which is in block B or the medium black square that is in block A?
the medium black square  which is in block B the medium black square  that is in block A both of them none of them