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