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