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