There are three blocks. Lets call them A, B and C. Block B is above blocks C and A. Block A has a medium blue square. This block also has a medium black square. Below the medium black square there is the medium blue square. Block B has one medium yellow square and a medium blue square. Below the medium blue square is the medium yellow square. And block C contains a medium yellow square.
Which object is below a medium yellow square? the medium blue square which is in block B or the medium blue square that is in block A?
the medium blue square  which is in block B the medium blue square  that is in block A both of them none of them