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