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