There are three blocks. We call them A, B and C. Block B is to the left of and A is to the right of C. Block A has one small black square, one medium black circle and a big blue circle. To the left of the big blue circle and the medium black circle is the small black square. The medium black circle is to the left of the big blue circle. Block B contains one small yellow square. And block C has one small black square.
Which object is to the right of a small black square? the medium black shape or the yellow square?
the medium black shape the yellow square  both of them none of them