There are three blocks, A, B and C. A medium black square is in block A. Below block A we have block B which has two medium black squares. Medium black square number one is touching the bottom edge of this block. Medium black square number two is below a medium blue square. Below a medium yellow square, the medium blue square and medium black square number two is medium black square number one.. The medium yellow square is below the medium blue square. To the right of block A there is block C. It has a medium black square. The medium black square is touching the bottom edge of this block. This block also has a medium yellow square. Below the medium yellow square is the medium black square.
Which object is below a medium black square? the medium yellow square that is in block B or the medium yellow square that is in block C?
the medium yellow square  that is in block B the medium yellow square  that is in block C both of them none of them