We have three blocks, A, B and C. Block C is above block B and to the left of block A. Block A contains a big blue triangle and a big blue circle. Above the big blue circle there is the big blue triangle. Block B contains one small yellow circle and a big blue triangle. Near to the big blue triangle is the small yellow circle. And block C contains a small yellow circle and a medium black circle. Far from, to the left of and above the medium black circle is the small yellow circle. The medium black circle is touching the bottom edge of this block.
What is to the left of the black circle? a small yellow circle or a big blue circle?
small yellow circle  big blue circle  both of them none of them