There are two blocks, A and B. Block A is above B. Block A has a medium blue triangle. Block B has a small yellow square, a small blue triangle and a medium black circle. The small blue triangle is below a medium yellow triangle. The medium black circle is to the left of a big black square. The big black square is touching the right edge of this block. The small blue triangle is touching the right edge of this block. The medium yellow triangle is near to, below and to the left of the big black square.
What is below the medium blue triangle? a small blue triangle or a medium yellow triangle?
small blue triangle  medium yellow triangle  both of them none of them