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