There are three blocks, A, B and C. Block C is below A and block A is to the right of B. Block A has one medium yellow triangle. Block B has a small blue triangle and one medium black triangle. It also has a small black triangle. The medium black triangle is below, to the left of and near to the small black triangle. Block C contains one small blue triangle.
What is below the yellow shape? a small blue triangle or a small black triangle?
small blue triangle  small black triangle  both of them none of them