We have three blocks, A, B and C. Block C is to the left of and A is above B. Block A contains a small black circle and one big black circle. The small black circle is near to the big black circle and a big yellow triangle. Block B has one medium yellow square. Block C has a small blue square. It also contains a small yellow triangle and a medium yellow circle. The small blue square is touching the left edge of this block. It is to the left of and below the medium yellow circle. To the right of the small shape which is to the left of the medium yellow circle is the small yellow triangle.
What is to the left of the medium yellow square? a big yellow triangle or a small yellow triangle?
big yellow triangle  small yellow triangle  both of them none of them