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