We have three blocks. Lets call them A, B and C. Block A is to the right of B. Block C is to the left of A. Block A has a medium blue square. Block B has a big black triangle and one big blue circle. Below and to the right of the big blue circle there is the big black triangle. Block C contains one medium blue square and a big yellow triangle. This block also contains a small blue circle. Above, near to and touching a small black triangle is the small blue circle. The medium blue square is touching the top edge of this block. This shape is to the left of the big yellow triangle and the small blue circle.
Which object is to the left of a medium blue square? the big black triangle or the yellow thing?
the big black triangle  the yellow thing both of them none of them