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