We have three blocks, A, B and C. Block B is above and C is to the left of A. Block A contains two medium black squares. Below medium black square number two there is medium black square number one. Block B contains a medium yellow square and a medium blue square. Below the medium blue square is the medium yellow square. Block C has a medium yellow square.
Which object is below a medium 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