There are three blocks. We call them A, B and C. One medium blue triangle is in block A. Below block A we have block B. It has a big yellow circle and a small blue square. The small blue square is touching the right edge of this block. The big yellow circle is touching the right edge of this block. This object is above the small blue square. To the left of block A there is block C which contains a small black circle and one big black triangle. To the left of the big black triangle there is the small black circle.
What is below the blue triangle? a small square that is touching the right edge of a block or a big black triangle?
small square  that is touching the right edge of  a block  big black triangle  both of them none of them