There are three blocks, A, B and C. Two medium yellow squares are in block A. Medium yellow square number one is below medium yellow square number two and a medium black square. Below the medium black square is medium yellow square number two. Block B is above block A. It contains a medium black square. Above block B there is block C with a medium yellow square in it. A medium black square is touching the bottom edge of this block. It is below the medium yellow square.
Which object is above a medium black square? medium yellow square number one or the medium yellow square that is in block C?
medium yellow square  number one the medium yellow square  that is in block C both of them none of them