There are three blocks, A, B and C. Block A has a medium blue circle. Then, there is block B which contains a big black circle, one small black circle and a small blue square. The big black circle is near to and to the right of the small blue square. Near to and to the left of the small blue square there is the small black circle. Finally, we have block C below both blocks A and B. It has a small blue circle, a medium black triangle and one big black triangle. The medium black triangle is below, to the left of and near to the big black triangle which is far from, above and to the right of a small black circle.. One small yellow triangle is also in this block. A big yellow circle is touching the bottom edge of this block.
What is below the medium blue circle? a small yellow triangle or a big yellow circle which is touching the bottom edge of a block?
small yellow triangle  big yellow circle  which is touching the bottom edge of a block  both of them none of them