There are three blocks, A, B and C. Block C is above B and block B is above A. Block A has two medium black squares. Medium black square number one is below medium black square number two. Block B has two medium black squares. Medium black square number one is below medium black square number two. Block C has a medium yellow square and a medium blue square. The medium yellow square is below the medium blue square.
What is below the blue thing? a medium yellow square or a medium black square?
medium yellow square  medium black square  both of them none of them