There are three blocks, A, B and C. A medium blue triangle is in block A. Then, there is block B which has one small black triangle and one big blue triangle. The small black triangle is above and to the left of the big blue triangle. Block C is below block B and above block A. It has a small black triangle and one medium black square. To the left of and above the medium black square there is the small black triangle.
Which object is above a small black triangle? the big blue triangle or the medium blue triangle?
the big blue triangle  the medium blue triangle  both of them none of them