We have three blocks, A, B and C. A medium blue square is in block A. Then, there is block B. It contains a medium yellow square. To the right of both blocks B and A there is block C which contains two medium black squares. Below medium black square number two and a medium yellow square is medium black square number one. The medium yellow square is below medium black square number two.
Which object is to the left of a medium black square? the medium yellow square that is in block B or the medium yellow square that is in block C?
the medium yellow square  that is in block B the medium yellow square  that is in block C both of them none of them