There are three blocks, A, B and C. Block A has a small yellow triangle and one small blue triangle. The small yellow triangle is to the right of and above the small blue triangle. Below block A there is block B. It contains a medium black square, one small blue triangle and one big black circle. To the left of the small blue triangle and the big black circle there is the medium black square. The big black circle is touching the right edge of this block. The small blue triangle is touching the right edge of this block. It is above and near to the big black circle. Above block B there is block C. It contains one small blue square and one medium black triangle. A medium yellow square is to the left of and far from the small blue square which is above the medium black triangle. The small blue square is touching the top edge of this block.
What is below the medium yellow square? a small blue triangle or a small yellow triangle?
small blue triangle  small yellow triangle  both of them none of them