There are three blocks, A, B and C. Block A contains a medium black square. To the left of block A there is block B. It has three medium black squares. Medium black square number one is below medium black square number three and medium black square number two. Medium black square number two is below medium black square number three. To the left of block A there is block C. It contains one medium black square.
Which object is to the left of a medium black square? medium black square number two or medium black square number three?
medium black square  number two medium black square  number three both of them none of them