There are two blocks, A and B. Block A has one medium black circle, a big yellow triangle and one medium black triangle. Above the medium black triangle and the medium black circle is a small yellow triangle. Below and near to the medium black triangle is the medium black circle. Block B is above block A. It contains a big blue circle and one small yellow circle. The big blue circle is below and to the left of the small yellow circle.
What is above the medium black triangle? a medium black circle or a big blue circle?
medium black circle  big blue circle  both of them none of them