We have three blocks, A, B and C. Block A has one medium black square. Block B is above block A. It contains one medium black square and one medium blue square. Below the medium blue square there is the medium black square. To the right of block B there is block C which contains one medium yellow square and a medium black square. The medium yellow square is below the medium black square.
Which object is below a medium black square? the yellow object or the medium blue square?
the yellow object the medium blue square  both of them none of them