There are three blocks. We call them A, B and C. One medium yellow square is in block A. Block B is to the right of block A. It has a medium black square. To the left of block B there is block C with one medium blue square in it. There is also one medium yellow square in this block. It is below a medium black square. The medium blue square is below the medium yellow square and the medium black square.
Which object is to the left of a medium black square? the medium yellow square which is in block A or the medium yellow square that is in block C?
the medium yellow square  which is in block A the medium yellow square  that is in block C both of them none of them