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