There are three blocks, A, B and C. There is one medium blue square in block A. Below block A is block B which has two medium black squares. Below medium black square number two is medium black square number one. Below block A there is block C which has two medium blue squares. Medium blue square number one is below medium blue square number two and a medium black square. Medium blue square number two is below the medium black square.
Which object is below a medium blue square? medium black square number one or medium black square number two?
medium black square  number one medium black square  number two both of them none of them