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