There are two blocks, A and B. Block A is to the left of B. Block A contains one medium yellow circle, one big black circle and a small blue triangle. To the right of and below the big black circle there is the medium yellow circle. To the right of the big black circle and the small blue triangle there is a big yellow triangle. Block B contains one small blue square. This block also has one medium yellow square. To the left of and below the medium yellow square there is the small blue square.
Which object is to the left of a small blue square? the big black circle or the medium yellow circle?
the big black circle  the medium yellow circle  both of them none of them