There are three blocks, A, B and C. Block B is below and A is to the left of C. Block A contains a medium black circle. Block B has two big blue squares. There is also a small black square in this block. This block also contains one small yellow square. Big blue square number two is to the right of and above the small black square. The small black square is above and to the left of the small yellow square. Big blue square number one is touching the bottom edge of this block. It is near to the black object which is above the small yellow square. It is to the left of the small yellow square. And block C has a medium blue square.
What is below the medium blue square? a medium black circle or a big blue square?
medium black circle  big blue square  both of them none of them