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