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