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