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