There are three blocks, A, B and C. Block A is to the right of C and block B is below A. Block A contains one medium yellow square. Block B contains a medium black square and one medium yellow square. It also contains a medium blue square. Below the medium yellow square is the medium black square. The medium blue square is below the medium yellow square and the medium black square. And block C has a medium black square.
Which object is to the left of a medium yellow square? the medium black square that is in block B or the medium black square that is in block C?
the medium black square  that is in block B the medium black square  that is in block C both of them none of them