There are three blocks, A, B and C. Block B is to the left of block A and it is above block C. Block A has one small yellow square. Block B has a medium black triangle. Block C contains one big yellow triangle, a big blue triangle and one medium yellow square. The big yellow triangle is touching the right edge of this block. This object is near to the big blue triangle. It is above the medium yellow square. To the left of the medium yellow square is the big blue triangle.
What is below the medium triangle? a big blue thing or a small yellow square?
big blue thing small yellow square  both of them none of them