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