We have three blocks, A, B and C. Block B is below A. Block C is above B. Block A has one small blue triangle. Block B contains one small black circle, one small blue triangle and one medium yellow square. Above the medium yellow square there is the small black circle. The small blue triangle is touching the right edge of this block. The medium yellow square is touching the bottom edge of this block. To the left of the small blue triangle which is above the medium yellow square is the small black circle. And block C has a big yellow circle and one small yellow circle. Above a big blue square there is the big yellow circle. The big blue square is to the right of the small yellow circle. To the right of the small yellow circle is the big yellow circle.
Which object is below a small blue triangle? the big blue square or the medium yellow square that is touching the bottom edge of a block?
the big blue square  the medium yellow square  that is touching the bottom edge of a block  both of them none of them