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