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