We have three blocks, A, B and C. One medium blue square and one medium black square are in block A. The medium blue square is below the medium black square. Below block A is block B which has a medium yellow square, a medium black square and a medium blue square. The medium yellow square is touching the bottom edge of this block. The medium black square is below the medium blue square. Below the medium blue square and the medium black square is the medium yellow square. Below block A there is block C with a medium blue 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 which is in block C?
the medium blue square  that is in block B the medium blue square  which is in block C both of them none of them