There are three blocks. We call them A, B and C. Block A contains a big yellow square and one small yellow triangle. The big yellow square is below a small blue square. Near to the small blue square there is the small yellow triangle. It also contains one big blue circle. Below the small yellow triangle and the small blue square is the big blue circle. This object is to the right of the yellow object which is below the small blue square. Above block A we have block B which has a small blue triangle. Finally, we have block C which is below block A. It contains one small blue triangle, a small yellow square and a medium black square. Near to, touching and to the left of the medium black square is the small blue triangle. To the left of and above the medium black square there is the small yellow square.
Which object is below a small blue triangle? the small yellow square or the big yellow square?
the small yellow square  the big yellow square  both of them none of them