There are three blocks, A, B and C. Two medium blue squares are in block A. Medium blue square number one is below medium blue square number two. Block B is above block A. It contains two medium yellow squares. Below a medium black square is medium yellow square number one. Medium yellow square number two is below the medium black square. Medium yellow square number one is below medium yellow square number two. Finally, we have block C which is above block B. It contains one medium blue square and one medium black square. The medium blue square is touching the bottom edge of this block. It is below the medium black square.
Which object is below a medium black square? medium yellow square number two or medium yellow square number one?
medium yellow square  number two medium yellow square  number one both of them none of them