There are three blocks. We call them A, B and C. Block C is to the left of A. Block A is above B. Block A contains one small blue triangle. Below the small blue triangle and a medium blue square there is a medium blue triangle. Near to the medium blue square there is the small blue triangle. Block B contains a small black triangle. And block C has one big blue square and one medium black triangle. The big blue square is near to, to the left of and below a medium blue circle. It is to the right of and near to the medium black triangle.
Which object is to the left of a medium blue object? the medium black triangle or the medium blue triangle?
the medium black triangle  the medium blue triangle  both of them none of them