We have three blocks. Lets call them A, B and C. Block A has a big black square. It also has a medium black circle and a small blue square. The medium black circle is near to the big black square. The small blue square is to the left of the big black square. The medium black circle is to the right of and below the square which is to the left of the big black square. Above block A is block B which contains a medium yellow triangle. Above block B there is block C which contains one small blue triangle and one big yellow triangle. To the left of, near to and below the big yellow triangle there is a big black triangle. The small blue triangle is touching the right edge of this block. This block also has a small yellow triangle. Above and to the right of the small yellow triangle is the small blue triangle.
What is below the medium yellow triangle? a big black square or a small yellow triangle?
big black square  small yellow triangle  both of them none of them