We have two blocks, A and B. A medium yellow square and a medium blue square are in block A. Below the medium blue square there is the medium yellow square. Block B is to the left of block A. It has two medium black squares. It also contains a medium yellow square. It is below medium black square number two. Below medium black square number two and the medium yellow square is medium black square number one.
Which object is below a medium black square? the medium yellow square that is in block B or the medium yellow square that is in block A?
the medium yellow square  that is in block B the medium yellow square  that is in block A both of them none of them