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A line is drawn through the point (1, 2)...

A line is drawn through the point (1, 2) to meet the coordinate axes at P and Q such that it forms a triangle OPQ, where O is the origin. If the area of the triangle OPQ is least, then the slope of the line PQ is (1) `-1/4` (2) `-4` (3) `-2` (4) `-1/2`

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