There are three blocks. We call them A, B and C. Block A contains one medium yellow triangle, one big blue circle and one big yellow triangle. A small black circle is also touching the top edge of this block. A small yellow square is above the big blue circle which is to the right of and below the big yellow triangle. To the right of the small black circle there is the medium yellow triangle. This block also has a small yellow circle. To the right of the small black circle is the small yellow square. Then, we have block B which contains one big blue triangle. Finally, we have block C. It is to the left of block A and block B is below it. It contains one medium blue circle. A medium black square is above, to the left of and near to the medium blue circle.
What is to the left of the big yellow triangle? a big blue circle or a medium blue circle?
big blue circle  medium blue circle  both of them none of them