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