We have three blocks. We call them A, B and C. Block A contains two small black triangles. Above small black triangle number two is small black triangle number one. Block B is to the right of block A. It contains one big yellow circle. A big blue triangle is below the big yellow circle. Finally, there is block C. It is to the left of block A. It has a small yellow square. This block also contains one medium black triangle. The medium black triangle is to the right of the small yellow square.
What is to the left of the big triangle? a medium black thing or a square?
medium black thing square  both of them none of them