There are three blocks. Lets call them A, B and C. Block A is above blocks B and C. Block A contains a medium yellow square. Block B has a medium yellow square. The medium yellow square is touching the bottom edge of this block. This object is below a medium black square. Block C contains a medium black square. This block also has one medium yellow square. Below the medium black square there is the medium yellow square.
Which object is below a medium yellow square? the medium black square that is in block C or the medium black square which is in block B?
the medium black square  that is in block C the medium black square  which is in block B both of them none of them