There are three blocks. We call them A, B and C. Block A is to the left of C and block C is to the right of B. Block A contains two small black triangles. There are also one medium black circle and one big black circle in this block. Near to and to the right of the medium black circle there is a medium yellow square. This block also has a big yellow square. Small black triangle number one is touching the bottom edge of this block. This object is near to, below and to the left of the big black circle. Block B has a small blue triangle. And block C has a medium black square.
Which object is to the left of a medium black square? the big black circle or the medium yellow square?
the big black circle  the medium yellow square  both of them none of them