We have three blocks. Lets call them A, B and C. Block A is below block C and above block B. Block A has a medium yellow square. Block B contains a medium black square. Below the medium black square is a medium blue square. And block C has one medium blue square and a medium black square. The medium blue square is touching the bottom edge of this block. This object is below the medium black square.
Which object is above a medium square? the medium black square which is in block B or the medium black square which is in block C?
the medium black square  which is in block B the medium black square  which is in block C both of them none of them