There are three blocks, A, B and C. Blocks C and B are above A. Block A has one medium blue square. Block B contains a medium yellow square. Block C contains two medium black squares. Below medium black square number two is medium black square number one. It also contains a medium blue square. Below medium black square number two is the medium blue square. It is below medium black square number one.
Which object is above 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