We have three blocks, A, B and C. Block A contains one medium black square and a small yellow square. A big blue circle is also in this block. Above and to the left of a small yellow triangle is the big blue circle. The small yellow square is below and to the left of the small yellow triangle. The small yellow triangle is touching the right edge of this block. To the right of and above the small yellow square there is the medium black square. Block B is to the right of block A. It contains one big black circle. To the left of block B there is block C. It contains a medium black square and a big yellow square. The medium black square is touching the left edge of this block. This object is above, to the left of and touching the big yellow square.
What is to the left of the big black circle? a big blue circle or a big yellow square?
big blue circle  big yellow square  both of them none of them