We have three blocks, A, B and C. Block A is above B. Block B is below C. Block A has one medium yellow square. Block B contains two medium black squares. Below medium black square number two there is medium black square number one. It also has one medium blue square. The medium blue square is below medium black square number one and medium black square number two. And block C has one medium yellow 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