There are three blocks. We call them A, B and C. Block A has a medium blue square. Block B is to the right of block A. It contains a medium yellow square. To the left of block B there is block C. It has two medium black squares. Below medium black square number two there is medium black square number one. A medium blue square is touching the bottom edge of this block. This shape is below medium black square number two and medium black square number one.
Which object is to the left of a medium square? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them