We have three blocks, A, B and C. A medium yellow square is in block A. Below a medium black square and a medium blue square there is the medium yellow square. Below the medium blue square there is the medium black square. Block B is above block A. It contains one medium blue square. There is also a medium black square touching the bottom edge of this block. A medium yellow square is below the medium blue square. The medium black square is below the medium yellow square and the medium blue square. Finally, there is block C which is below block A. It has two medium black squares. Medium black square number one is touching the bottom edge of this block. Below a medium yellow square is medium black square number two. Medium black square number one is below the medium yellow square and medium black square number two.
Which object is above 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