We have three blocks, A, B and C. There are three medium blue squares in block A. One medium black square is also in this block. Medium blue square number two is below medium blue square number three. It is below the medium black square. Medium blue square number one is below medium blue square number three. It is below medium blue square number two and the medium black square. To the left of block A is block B which contains a medium black square. To the left of block B there is block C. It contains a medium yellow 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 A?
the medium black square  that is in block B the medium black square  that is in block A both of them none of them