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