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