There are three blocks. Lets call them A, B and C. Block A has one medium yellow square. Then, there is block B. It contains a medium yellow square and one medium blue square. Below the medium blue square is the medium yellow square. Finally, to the left of block B we have block C which is above block A. It contains a medium blue square and a medium black square. This block also has a medium yellow square. The medium blue square is touching the bottom edge of this block. Below the medium yellow square there is the medium black square. The medium blue square is below the medium yellow square and the medium black square.
Which object is below a medium blue square? the medium yellow square that is in block C or the medium yellow square that is in block B?
the medium yellow square  that is in block C the medium yellow square  that is in block B both of them none of them