There are three blocks, A, B and C. Block B is above and C is below A. Block A contains one medium yellow triangle. Block B contains a big black triangle. Block C has one small yellow triangle and one medium yellow triangle. This block also has a big yellow square. Below and far from the medium yellow triangle is the small yellow triangle. It is to the left of and below the big yellow square.
What is below the big triangle? a big yellow square or a small object?
big yellow square  small object both of them none of them