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