There are three blocks, A, B and C. Block C is below A. Block A is below B. Block A has one medium black square. Block B has one big black triangle and one medium yellow circle. A medium black square is above the medium yellow circle. The big black triangle is above and near to the medium yellow circle. And block C has a small blue square and one big blue square. Near to, to the left of and above the big blue square there is the small blue square.
What is above the big blue square? a small square or a medium yellow circle?
small square  medium yellow circle  both of them none of them