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