There are three blocks, A, B and C. A medium blue square and one medium black square are in block A. Below the medium black square there is the medium blue square. Then, we have block B which has one medium yellow square and one medium blue square. Below the medium blue square is the medium yellow square. Finally, to the right of block A we have block C. It is above block B. It has a medium black square.
Which object is below a medium black square? the medium blue square that is in block B or the medium blue square that is in block A?
the medium blue square  that is in block B the medium blue square  that is in block A both of them none of them