There are three blocks, A, B and C. Block A has one medium yellow square and one medium black square. There is also one medium blue square in this block. It is below the medium black square. The medium yellow square is touching the bottom edge of this block. This shape is below the medium black square and the medium blue square. Then, there is block B with a medium black square in it. Finally, we have block C which is below block A and above block B. It contains three medium blue squares. Below medium blue square number two is medium blue square number one. Below medium blue square number three is medium blue square number two. Below medium blue square number three is medium blue square number one.
Which object is above a medium black square? medium blue square number one or medium blue square number three?
medium blue square  number one medium blue square  number three both of them none of them