Consider a curve C given by the equation, \( \mathrm{y}=2 \mathrm{x}^{2}-\mathrm{x}+3 \) Assume C crosses the y axis at the point P and the straight line L is normal to \( C \) at point \( P \) .Find the equation of the line \( L \) .

A \( x+y-3=0 \)

B \( x+y+3=0 \)

C \( x-y+3=0 \)