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

Question

( A ) $-2$
( B ) $-\frac{1}{2}$
( C ) $-\frac{1}{4}$
( D ) $-4$