There are three blocks, A, B and C. Block A is below and B is to the left of C. Block A has one big blue triangle and one medium black circle. Below the medium black circle is the big blue triangle. Block B has a small black square. A small blue triangle is touching the bottom edge of this block. It is below and to the left of the small black square. Block C contains one medium black circle.
Which object is below a medium black circle? the big blue triangle or the square?
the big blue triangle  the square  both of them none of them