There are three blocks, A, B and C. There is a medium yellow square in block A. To the left of block A is block B with two medium black squares in it. Below medium black square number two is a medium blue square. Below medium black square number two is medium black square number one. It is below the blue shape which is below medium black square number two. To the right of block A there is block C which contains two medium yellow squares. Medium yellow square number one is below medium yellow square number two.
Which object is to the left of a medium yellow square? medium black square number one or medium black square number two?
medium black square  number one medium black square  number two both of them none of them