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