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