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