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