There are three blocks, A, B and C. Block A contains a medium yellow square. A medium black square is also in this block. The medium yellow square is touching the bottom edge of this block. This shape is below the medium black square. Above block A is block B with one medium blue square and one medium black square in it. Below the medium black square there is the medium blue square. Below block A there is block C with a medium yellow square in it.
Which object is below a medium 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