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