We have three blocks, A, B and C. Block A is to the left of B. Block C is below A. Block A contains one small blue triangle. Block B contains a medium blue square and one big black square. A big blue square is touching the right edge of this block. The medium blue square is to the left of the big blue square. It is above and to the right of the big black square. Block C contains one big black square and one big yellow square. The big black square is touching the right edge of this block. It is above the big yellow square.
What is to the left of the big blue square? a big black square or a small blue triangle?
big black square  small blue triangle  both of them none of them