We have three blocks. We call them A, B and C. Block C is below blocks A and B. Block A has a big yellow triangle. Block B contains a small blue triangle. Far from and below the small blue triangle there is a big blue circle. Below the small blue triangle is a big black square. Block C has a small yellow circle, a small yellow square and a medium yellow triangle. Near to, above and to the left of the medium yellow triangle there is the small yellow square.
What is below the big yellow triangle? a small yellow square or a medium triangle?
small yellow square  medium triangle  both of them none of them