There are three blocks. Lets call them A, B and C. Block C is to the left of and B is below A. Block A has a medium blue square. A medium yellow square is touching the bottom edge of this block. This shape is below the medium blue square. Block B contains a medium blue square and one medium yellow square. The medium blue square is below the medium yellow square. Block C has one medium black square.
What is below the thing that is touching the bottom edge of a block? a medium black square or a medium blue square?
medium black square  medium blue square  both of them none of them