There are three blocks, A, B and C. One medium blue square is in block A. Then, we have block B which contains one medium blue square. A medium yellow square is also in this block. Below the medium yellow square is the medium blue square. Finally, above block B we have block C. It is below block A. It contains a medium blue square and a medium yellow square. The medium blue square is below the medium yellow square which is below a medium black square. It is below the medium black square.
Which object is below a medium blue square? the medium yellow square which is in block C or the medium yellow square which is in block B?
the medium yellow square  which is in block C the medium yellow square  which is in block B both of them none of them