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