We have two blocks, A and B. Block A contains a medium black triangle. Below the medium black triangle is a small black square. Below block A there is block B. It has a medium black square, one medium blue triangle and one small yellow square. The medium black square is near to and below the small yellow square. The medium blue triangle is below the small yellow square.
What is below the medium black triangle? a small black square or a small yellow square?
small black square  small yellow square  both of them none of them