There are two blocks, A and B. A small yellow square, a small black square and a medium yellow triangle are in block A. A big black circle is to the right of the small black square and the medium yellow triangle. Block B is to the right of block A. It contains one small yellow square.
Which object is to the left of a small yellow square? the small black square or the medium object?
the small black square  the medium object both of them none of them