There are three blocks, A, B and C. Block B is above block C and to the right of block A. Block A contains a medium yellow square. Block B has one medium black square and one medium blue square. A medium yellow square is also in this block. It is below the medium blue square. The medium black square is touching the bottom edge of this block. It is below the medium yellow square and the medium blue square. Block C contains one medium yellow square.
What is below the black object? a medium yellow square which is in block B or a medium yellow square which is in block C?
medium yellow square  which is in block B medium yellow square  which is in block C both of them none of them