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