There are three blocks, A, B and C. Block A is below B and block C is below A. Block A has one medium yellow square, a big yellow circle and a small yellow circle. A big blue circle is touching the right edge of this block. The small yellow circle is above a medium black square. To the right of and below the big yellow circle there is the medium yellow square. To the right of, far from and above the big yellow circle is the big blue circle. Block B has one small black square. And block C has a small black triangle.
Which object is below a big circle? the medium black square or the small yellow circle?
the medium black square  the small yellow circle  both of them none of them