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