There are three blocks, A, B and C. Block A is above blocks C and B. Block A contains a small yellow square, a medium black circle and one big black triangle. The small yellow square is to the left of the big black triangle and the medium black circle. To the right of the big black triangle is a medium black triangle. The big black triangle is touching the bottom edge of this block. Block B contains one big blue square. Block C has one small blue circle.
Which object is above a small blue circle? the medium black circle or the medium black triangle?
the medium black circle  the medium black triangle  both of them none of them