If $\cot\theta+\tan\theta=2cosec \theta$,then find the general value of $\theta$

Question

$\begin{array}{1 1}(A)\;2n\pi\pm \large\frac{\pi}{3}&(B)\;n\pi\pm \large\frac{\pi}{4}\\(C)\;3n\pi\pm \large\frac{\pi}{5}&(D)\;2n\pi\pm \large\frac{\pi}{8}\end{array} $