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