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