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