There are three blocks, A, B and C. Block B is above block C and to the left of block A. Block A contains a medium yellow circle. Block B has one big yellow circle, a medium yellow circle and a medium black circle. One big blue triangle and one medium yellow square are also in this block. Below the medium yellow square and the medium black circle there is the big yellow circle. This shape is touching the right edge of this block. This object is to the right of the big blue triangle. The medium yellow circle is below the medium yellow square. And block C has one medium blue circle and a big yellow triangle. The medium blue circle is to the left of the big yellow triangle.
Which object is to the left of a medium yellow circle? the medium black circle or the yellow shape that is touching the right edge of a block?
the medium black circle  the yellow shape that is touching the right edge of  a block  both of them none of them