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