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