We have three blocks, A, B and C. A medium black square and a medium blue square are in block A. The medium black square is touching the bottom edge of this block. It is below the medium blue square. Block B is below block A. It contains a medium black square and a medium yellow square. The medium black square is below the medium yellow square. Finally, we have block C. It is below block A. It has a medium yellow square.
Which object is below a medium black square? the medium yellow square which is in block C or the medium yellow square that is in block B?
the medium yellow square  which is in block C the medium yellow square  that is in block B both of them none of them