There are three blocks. We call them A, B and C. Block A is below block C and it is to the right of block B. Block A contains a small blue square and one medium black circle. Near to and below a big black triangle is the small blue square. The medium black circle is to the right of the big black triangle. Block B contains one small yellow square. And block C has a big yellow square, one medium blue triangle and one medium yellow circle. The big yellow square is touching the bottom edge of this block. It is below the medium yellow circle and the medium blue triangle.
What is below the medium yellow circle? a small blue square or a big black triangle?
small blue square  big black triangle  both of them none of them