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