There are three blocks, A, B and C. Block B is to the right of A and block C is above B. Block A contains a medium yellow square and one medium black circle. Above the medium black circle there is the medium yellow square. Block B contains one small black triangle, one small black circle and one small blue circle. To the right of the small blue circle there is the small black triangle. To the right of and above the small blue circle there is the small black circle. Block C has one big blue square and one small yellow square. The big blue square is to the left of and near to the small yellow square.
Which object is above a small black object? the big square or the medium black circle?
the big square  the medium black circle  both of them none of them