There are three blocks. Lets call them A, B and C. Block A is to the left of B and block B is to the right of C. Block A has one medium blue square. Block B contains a medium yellow square and one medium black square. The medium yellow square is below the medium black square. And block C contains four medium black squares. Below medium black square number two , medium black square number three and medium black square number four is medium black square number one. Below medium black square number four is medium black square number two. Below medium black square number four there is medium black square number three.
What is to the left of the yellow object? a medium blue square or a medium black square?
medium blue square  medium black square  both of them none of them