There are two blocks, A and B. Block A is below B. Block A has a small yellow square, a medium blue square and one big blue triangle. This block also contains one small blue square. The small yellow square is to the left of the small blue square. To the left of the small blue square is the medium blue square. It is below, to the left of and far from the big blue triangle. Block B has a small black circle, one big black square and one medium yellow circle. The small black circle is touching the right edge of this block. Above the medium yellow circle is the big black square. To the right of the medium yellow circle is the small black circle. It is below the big black square.
What is below the small black circle? a small yellow square or a medium blue square?
small yellow square  medium blue square  both of them none of them