We have three blocks, A, B and C. Block A is below C and block B is to the left of A. Block A contains one medium blue square and a medium yellow square. Below the medium yellow square is the medium blue square. Block B has one medium black square. And block C has one medium black square. It also contains a medium blue square. The medium black square is below the medium blue square.
What is above the yellow thing? a medium blue square which is in block A or a medium blue square that is in block C?
medium blue square  which is in block A medium blue square  that is in block C both of them none of them