There are three blocks, A, B and C. Block C is above block B and to the right of block A. Block A has a medium blue square. Block B contains one medium yellow square. And block C has two medium black squares. Medium black square number one is below medium black square number two. It also has one medium blue square. The medium blue square is below medium black square number two. This object is below medium black square number one.
Which object is above a yellow object? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them