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