There are three blocks, A, B and C. Block C is above block A and to the left of block B. Block A has a medium yellow square. To the right of a big black square there is the medium yellow square. Block B has a small yellow square. And block C has one small black triangle, one medium blue triangle and a small yellow triangle. The small black triangle is above and to the left of the medium blue triangle. Above and near to the small yellow triangle is the medium blue triangle.
Which object is above a medium yellow square? the small yellow triangle or the big black square?
the small yellow triangle  the big black square  both of them none of them