We have three blocks, A, B and C. Block C is to the left of block A and to the right of block B. Block A has one medium black square. Block B has a big black square. And block C has one big yellow triangle. It also has a small black triangle. The small black triangle is to the left of the big yellow triangle. This block also contains a small yellow triangle. It is below the big yellow triangle. The small black triangle is to the right of the small yellow triangle.
Which object is to the left of a black square? the small black triangle or the big yellow triangle?
the small black triangle  the big yellow triangle  both of them none of them