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