We have three blocks. We call them A, B and C. Block C is above A. Block A is above B. Block A contains two medium black circles. It also contains one medium black triangle and one big yellow triangle. Above medium black circle number two and medium black circle number one there is the medium black triangle. This block also has a small yellow square. Near to the big yellow triangle there is the medium black triangle. Medium black circle number one is touching the bottom edge of this block. Medium black circle number two is touching the bottom edge of this block. Medium black circle number one is to the left of medium black circle number two. Block B has a medium blue circle and one small blue triangle. The medium blue circle is to the left of and above the small blue triangle which is to the right of a medium yellow square. And block C has a big blue square.
What is below the small yellow square? a medium yellow square or a big blue square?
medium yellow square  big blue square  both of them none of them