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