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