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