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