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