There are three blocks, A, B and C. There is one medium yellow square in block A. Block B is to the right of block A. It contains one medium blue square. Finally, there is block C. It is above block A. It contains two medium black squares. A medium yellow square is also in this block. 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.
Which object is below a medium yellow square? medium black square number one or medium black square number two?
medium black square  number one medium black square  number two both of them none of them