There are three blocks, A, B and C. Block A is above block C and it is below block B. Block A contains a medium black circle. Above the medium black circle there is a big black triangle. Block B has a big yellow triangle, one medium black circle and a small blue circle. One medium black square is also in this block. This block also has a small blue triangle. The big yellow triangle is below the small blue circle. Below the small blue circle and a medium blue circle there is the medium black circle. Block C has one small yellow circle.
Which object is above a small yellow circle? the big black triangle or the small blue triangle?
the big black triangle  the small blue triangle  both of them none of them