We have three blocks, A, B and C. Block C is to the left of B and block A is above C. Block A has one medium blue triangle. It also has a medium black square. The medium blue triangle is above, to the right of and near to the medium black square. Block B contains a medium blue square and a small blue square. A big blue circle is touching the right edge of this block. The medium blue square is to the right of the small blue square which is to the left of the big blue circle. It is to the left of the big blue circle. And block C has a big black circle and one medium black circle. The big black circle is above the medium black circle.
What is below the medium black square? a medium black circle or a medium blue triangle?
medium black circle  medium blue triangle  both of them none of them