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