We have three blocks, A, B and C. There are one medium black circle, a medium yellow triangle and a big black circle in block A. It also has a small blue triangle. Above the medium black circle and the big black circle is the small blue triangle. The medium yellow triangle is to the left of and above the big black circle. Below block A is block B. It contains a small yellow square. It also has one big yellow square. Below the big yellow square there is the small yellow square. Finally, we have block C. It is to the right of block A. It contains a small blue triangle.
Which object is above a big yellow square? the medium black circle or the small yellow square?
the medium black circle  the small yellow square  both of them none of them