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