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