There are three blocks. We call them A, B and C. Block A has a medium blue square, a medium black circle and one big yellow square. The medium blue square is above the medium black circle and the big yellow square. Then, there is block B which has a medium yellow circle, a medium blue square and one medium yellow triangle. The medium yellow circle is to the left of the medium blue square and the medium yellow triangle. Block C is to the left of block A and to the right of block B. It has one big blue triangle.
What is to the left of the big blue triangle? a medium yellow circle or a big yellow square?
medium yellow circle  big yellow square  both of them none of them