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