We have three blocks, A, B and C. Blocks B and C are above A. Block A contains a medium black square, one medium blue square and one medium yellow square. Below the medium blue square and the medium yellow square is the medium black square. The medium blue square is below the medium yellow square. Block B has a medium blue square. And block C contains one medium yellow square.
Which object is below a medium yellow square? the medium blue square that is in block B or the medium blue square that is in block A?
the medium blue square  that is in block B the medium blue square  that is in block A both of them none of them