Apply Gauss's theorem to calculate the electric field of a thin infinitely long straight line

Question

$\begin{array}{1 1} (a)\;E=2k \large\frac{\lambda}{r}\\ (b)\;E=\large\frac{k \lambda}{r} \\ (c)\;E= \large\frac{2k \lambda}{r^2} \\ (d)\;E=\large\frac{k \lambda}{r} \end{array} $