There are three blocks, A, B and C. A small black triangle, one medium black circle and a big yellow square are in block A. Below and to the right of the big yellow square there is the small black triangle. The medium black circle is below and to the left of the big yellow square. Block B is above block A. It contains a big blue square, a big black circle and one medium yellow triangle. This block also contains a medium blue square. The medium yellow triangle is touching the bottom edge of this block.. The big blue square is above the big black circle and the medium yellow triangle. To the left of and below the medium blue square there is the big black circle. It is to the left of the medium yellow triangle. Finally, we have block C to the left of block B. It has a small yellow circle, a medium blue square and a small blue square. Near to and to the left of the small blue square there is the small yellow circle. Above, near to and to the right of a big yellow circle there is the medium blue square.
Which object is below a big black circle? the small black triangle or the small blue square?
the small black triangle  the small blue square  both of them none of them