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