There are three blocks, A, B and C. Blocks C and B are to the left of A. Block A has a medium blue square. Block B contains one medium blue square and one medium black square. Below the medium black square is the medium blue square. Block C contains two medium black squares. One medium yellow square is also in this block. 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 medium black square number two and the medium yellow square.
Which object is to the left of a medium blue square? the medium black square that is in block B or medium black square number two?
the medium black square  that is in block B medium black square  number two both of them none of them