There are three blocks. We call them A, B and C. Block A contains a medium blue square and one medium yellow square. Below the medium yellow square there is the medium blue square. Block B is above block A. It has a medium blue square. Below block A there is block C with one medium yellow square in it. The medium yellow square is below a 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 which is in block A?
the medium yellow square  that is in block C the medium yellow square  which is in block A both of them none of them