There are three blocks, A, B and C. There are one big black triangle and one medium yellow square in block A. The big black triangle is to the right of, below and near to the medium yellow square. Then, there is block B with one big yellow triangle, one small blue triangle and one big black square in it. The big yellow triangle is above the small blue triangle which is to the left of the big black square. The big black square is touching the right edge of this block. The big yellow triangle is above the big black square. Finally, below block B we have block C. It is to the left of block A. It has one big blue triangle.
Which object is above a big blue triangle? the medium square or the big yellow triangle?
the medium square  the big yellow triangle  both of them none of them