There are three blocks, A, B and C. Block A is to the left of block B and it is below block C. Block A has one medium black triangle and one medium blue circle. A small blue square is above and to the left of the medium blue circle. Above the medium blue circle is the medium black triangle. Block B contains one medium black circle. Block C has one big blue triangle and a small black circle. To the right of the small black circle is the big blue triangle.
What is to the left of the medium black circle? a big triangle or a medium blue circle?
big triangle  medium blue circle  both of them none of them