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