There are three blocks. Lets call them A, B and C. One medium blue circle, one medium black triangle and one small black square are in block A. The medium black triangle is touching the right edge of this block. It is below the small black square. The medium blue circle is to the left of the medium black triangle and the small black square. Block B is below block A. It has a medium yellow circle. To the left of block B there is block C with one big yellow square and one small black triangle in it. It also contains a big black circle. The big black circle is to the right of the small black triangle and the big yellow square.
What is above the medium yellow circle? a small black square or a big yellow square?
small black square  big yellow square  both of them none of them