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