There are three blocks. Lets call them A, B and C. A big black circle is in block A. Block B is to the right of block A. It has a big blue circle, one medium black triangle and a small yellow square. The big blue circle is to the right of the medium black triangle and the small yellow square. Above block B there is block C with one medium black circle and one medium blue square in it. This block also has one medium blue circle. This block also contains a medium yellow square. The medium blue circle is above the medium yellow square. The medium black circle is to the left of the medium yellow square and the medium blue square.
What is above the triangle? a medium black circle or a big blue circle?
medium black circle  big blue circle  both of them none of them