There are three blocks. We call them A, B and C. Block B is below blocks A and C. Block A contains a medium blue square. Block B has a medium black square. And block C contains two medium black squares. Below medium black square number two there is medium black square number one. A medium yellow square is below medium black square number two. It is below medium black square number one.
Which object is below a medium black 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