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