There are three blocks, A, B and C. A medium yellow square is in block A. To the left of block A there is block B which has one medium black square. Finally, there is block C which is below block B. It has one medium blue square and one medium black square. Below a medium yellow square is the medium black square. The medium blue square is below the medium yellow square and the medium black square.
Which object is below a medium black square? the medium yellow square that is in block C or the medium yellow square which is in block A?
the medium yellow square  that is in block C the medium yellow square  which is in block A both of them none of them