There are two blocks, A and B. Block A contains one medium black square, one small blue triangle and a medium yellow triangle. A small blue circle is also in this block. Above the medium yellow triangle there is the small blue triangle. It is below the small blue circle. The medium black square is to the right of the small blue circle. It is touching the bottom edge of this block. This object is below the small blue triangle. This shape is to the left of the medium yellow triangle. Block B is to the right of block A. It has a big blue triangle and a medium yellow square. There are also a medium black circle and a big black circle in this block. The medium yellow square is near to and above the medium black circle. The medium black circle is below and to the right of the big black circle. Above and to the right of the big black circle is the big blue triangle.
What is to the left of the big blue triangle? a medium black circle or a small blue triangle?
medium black circle  small blue triangle  both of them none of them