We have three blocks. We call them A, B and C. Block C is above block B and to the right of block A. Block A has a medium blue square. Block B contains a medium yellow square, one medium blue square and a medium black square. The medium yellow square is below the medium blue square and the medium black square. Below the medium black square is the medium blue square. And block C has two medium black squares. Medium black square number one is below medium black square number two. It is below a medium yellow square which is below medium black square number two.
Which object is below a medium black square? medium black square number two or the medium black square that is in block B?
medium black square  number two the medium black square  that is in block B both of them none of them