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