For the line whose equation is \(\dfrac{y+2-b}{x}=m+\dfrac{2}{x},\) \(m\) is not zero. If the line is rotated

[BTGmoderatorLU]

For the line whose equation is \(\dfrac{y+2-b}{x}=m+\dfrac{2}{x},\) \(m\) is not zero. If the line is rotated \(90^{\circ},\) then the slope of that line would be

A. \(1/m\)
B. \(-1/m\)
C. \(m\)
D. \(-m\)
E. \(m-2\)

The OA is B