We have three blocks, A, B and C. There is a medium blue square in block A. There is also one medium yellow square in this block. Below the medium yellow square is the medium blue square. Then, there is block B with one medium yellow square and a medium blue square in it. The medium yellow square is below the medium blue square. Finally, we have block C which is below block A and block B is to the left of it. It has one medium black square.
What is above the black object? a medium yellow square which is in block A or a medium yellow square which is in block B?
medium yellow square  which is in block A medium yellow square  which is in block B both of them none of them