We have three blocks, A, B and C. A medium blue square is in block A. To the left of block A we have block B. It contains a medium black square and a medium blue square. The medium black square is below the medium blue square. To the left of block A there is block C which has a medium blue square. Below a medium yellow square which is below the medium blue square is a medium black square. It is touching the bottom edge of this block. It is below the medium blue square.
Which object is to the left of a medium blue square? the medium blue square which is in block B or the medium blue square that is in block C?
the medium blue square  which is in block B the medium blue square  that is in block C both of them none of them