There are three blocks, A, B and C. Blocks A and C are below B. Block A contains a small black circle and one big black triangle. This block also contains one small yellow square. Above the big black triangle there is the small black circle. Near to and above the big black triangle is the small yellow square. Block B has one small black circle. Block C has one big black circle and one medium black circle. The big black circle is to the left of and near to the medium black circle.
Which object is below a small black circle? the big black triangle or the medium black circle?
the big black triangle  the medium black circle  both of them none of them