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