There are three blocks, A, B and C. Block A contains a big black circle. It also contains a medium yellow circle. The big black circle is to the right of the medium yellow circle. Block B is above block A. It contains one small black square, a small yellow triangle and one medium black circle. The small black square is above the small yellow triangle and the medium black circle. The medium black circle is touching the right edge of this block. Finally, we have block C below block B. It contains a big blue square, one small black circle and one medium black square. The big blue square is to the right of a medium blue triangle. It is touching the right edge of this block. The small black circle is far from, above and to the left of the medium black square. This object is to the left of the medium blue triangle.
Which object is to the right of a medium yellow circle? the big black circle or the small yellow triangle?
the big black circle  the small yellow triangle  both of them none of them