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