Find the equation of tangent to the ellipse $3x^2+4y^2=12$ which are parallel to the line $y+2x=4$

Question

$\begin{array}{1 1}(A)\;2x+19 \\(B)\;-2x+\sqrt {19} \\(C)\;2x-\sqrt {19} \\(D)\;x+\sqrt {19} \end{array}$