There are two blocks, A and B. Block A is to the left of B. Block A contains one medium blue square, one big yellow triangle and one small blue circle. Below, touching and to the right of the small blue circle is the medium blue square. The big yellow triangle is to the right of the small blue circle. This block also has a small yellow triangle. It also has one small black square. The big yellow triangle is touching the right edge of this block. It is to the right of the small black square. Block B contains one medium black square.
Which object is to the left of a medium black square? the circle or the small black square?
the circle  the small black square  both of them none of them