We have three blocks. We call them A, B and C. Block A contains one medium blue square and one medium yellow square. Below the medium yellow square is the medium blue square. Above block A there is block B which contains a medium yellow square. Finally, there is block C below block A. It contains two medium black squares. It also contains a medium blue square. Below medium black square number two is medium black square number one. Below medium black square number one and medium black square number two is the medium blue square.
Which object is below a medium yellow square? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them