There are three blocks, A, B and C. One medium black square and a medium blue square are in block A. This block also contains one medium yellow square. Below the medium yellow square is the medium blue square. The medium black square is below the medium blue square and the medium yellow square. Above block A there is block B with a medium black square and one medium blue square in it. The medium black square is below the medium blue square. To the right of block A there is block C with a medium black square in it.
Which object is below a medium black square? the medium blue square that is in block B or the medium blue square that is in block A?
the medium blue square  that is in block B the medium blue square  that is in block A both of them none of them