We have three blocks. We call them A, B and C. Block A is below blocks B and C. Block A contains one medium black square, one small black circle and one big black triangle. The medium black square is to the right of the big black triangle. It is to the left of the small black circle.. To the right of the big black triangle is the small black circle. Block B has one big blue square. To the left of, near to and below the big blue square there is a medium blue circle. And block C contains a small yellow triangle and one big black square. Near to the big black square is the small yellow triangle.
What is below the medium blue circle? a big black square or a big blue square?
big black square  big blue square  both of them none of them