We have three blocks. We call them A, B and C. There is one medium yellow square in block A. Block B is below block A. It contains a small black square. Near to the small black square there is a small blue square. Above block A there is block C with one medium blue circle and one big yellow triangle in it. Above the big yellow triangle is the medium blue circle.
What is below the medium blue shape? a big yellow triangle or a medium yellow square?
big yellow triangle  medium yellow square  both of them none of them