There are three blocks. Lets call them A, B and C. One medium black square and a medium blue square are in block A. The medium black square is below a medium yellow square and the medium blue square. Below the medium blue square is the medium yellow square. Block B is to the right of block A. It has two medium black squares. Below a medium yellow square there is medium black square number one. Medium black square number two is below the medium yellow square. Medium black square number one is touching the bottom edge of this block. It is below the medium black square number two. To the left of block A there is block C which has a medium blue square.
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 which is in block A?
the medium yellow square  that is in block B the medium yellow square  which is in block A both of them none of them